Folding hinge and foldable electronic device

Abstract

Disclosed are a folding hinge and a foldable electronic device. The folding hinge (023) comprises a base (100), a first support swing arm (400A1, 400B1), a damping swing arm (500), and a first damping assembly (700). The first support swing arm is rotatably connected to the base. The damping swing arm is rotatably connected to the base around a rotation axis by means of a rotation portion (520). The side where the rotation portion is located is a first side of the first support swing arm in the axial direction. The side of the first support swing arm facing away from the damping swing arm is a second side of the first support swing arm. A first end of the first damping assembly cooperates with the rotation portion, and a second end of the first damping assembly is located on the second side of the first support swing arm and is in limiting cooperation with the base. When the rotation portion rotates with the damping swing arm, the first end of the first damping assembly moves relative to the second end of the first damping assembly in the axial direction. The distance between the first support swing arm and the damping swing arm is reduced, thereby improving the reliability of the folding hinge when impacted.

Description

Folding hinges and foldable electronic devices

[0001] This application claims priority to Chinese Patent Application No. 202411473056.9, filed with the State Intellectual Property Office of China on October 21, 2024, entitled "Folding Hinge and Foldable Electronic Device", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application belongs to the field of foldable screen device technology, and in particular relates to a folding hinge and a foldable electronic device. Background Technology

[0003] As a crucial component of foldable electronic devices, the folding hinge's support directly determines the device's impact resistance reliability. The folding hinge primarily supports the base via a support arm, and also includes a damping arm. This damping arm, through a damping component, provides a damping effect during the folding of the electronic device, thus offering users a smooth opening and closing experience.

[0004] Currently, the layout of components in the damping assembly results in poor support effect of the support arm on the base at the position of the damping arm, thus making the impact reliability of the folding hinge poor. Summary of the Invention

[0005] This application provides a folding hinge and a foldable electronic device, which can shorten the distance between the damping arm and the supporting arm, improve the supporting effect of the supporting arm, and thus improve the impact reliability of the folding hinge.

[0006] To achieve the above objectives, the embodiments of this application adopt the following technical solutions:

[0007] In a first aspect, embodiments of this application provide a folding hinge. The folding hinge includes a base, a first supporting swing arm, a damping swing arm, and a first damping assembly. The first supporting swing arm is rotatably connected to the base. The damping swing arm includes a rotating portion, and the damping swing arm is rotatably connected to the base about a rotation axis via the rotating portion. The direction of the rotation axis is the axial direction. The side where the rotating portion is located is the first side of the supporting swing arm in the axial direction. The side of the first supporting swing arm opposite to the damping swing arm is the second side of the first supporting swing arm. A first end of the first damping assembly engages with the rotating portion; a second end of the first damping assembly is located on the second side of the first supporting swing arm and is limited by the base. When the rotating portion rotates with the damping swing arm, the first end of the first damping assembly moves relative to the second end of the first damping assembly along the axial direction.

[0008] In related technologies, due to the large space occupied by the first damping component, all the first damping components are distributed on the first side of the first support arm, resulting in a large gap between the first support arm and the damping arm. This large gap leads to poor support of the first support arm for the base at the location of the damping arm. External impacts such as drops from foldable electronic devices cause significant intrusion into the area where the damping arm is located, making it easy for the base to compress the foldable display screen it supports at that position, causing it to fail. Therefore, the impact resistance reliability of this folding hinge deteriorates due to the large gap between the first support arm and the damping arm.

[0009] In this folding hinge, the second end of the first damping component is located on the second side of the first support arm, meaning a portion of the first damping component has moved to the second side of the first support arm. Compared to related technologies, the gap between the first support arm and the damping arm is smaller. In this case, the support of the first support arm to the base is more effective at the location of the damping arm, and the intrusion of external impacts into the location of the damping arm during a drop is smaller, making it less likely for the base to crush the foldable display it supports at that location. Therefore, the impact reliability of this folding hinge is improved due to the reduced gap between the first support arm and the damping arm.

[0010] In some embodiments of this application, the first damping assembly includes a first movable frame and a first elastic member. The first elastic member is located on the second side of the first supporting swing arm; a first end of the first elastic member forms the second end of the first damping assembly, and the second end of the first elastic member engages with a first end of the first movable frame, which in turn forms the first end of the first damping assembly. The first and second ends of the first elastic member are positioned opposite each other in the axial direction. When the rotating part rotates with the damping swing arm, the first movable frame moves relative to the base along the axial direction, thereby causing the second end of the first elastic member to move relative to the first end of the first elastic member along the moving direction of the first movable frame.

[0011] In this folding hinge, the first elastic element in the first damping assembly moves to the second side of the first support arm. Compared to related technologies, the gap between the first support arm and the damping arm is smaller, with the reduction in gap being at least the length of the first elastic element. In this case, the support arm of the first support arm provides better support to the base at the location of the damping arm, and the intrusion of external impacts into the location of the damping arm during a drop is smaller, making it less likely for the base to crush the foldable display it supports at that location. Therefore, the impact reliability of this folding hinge is improved due to the reduced gap between the first support arm and the damping arm.

[0012] With the rotating part and the first elastic member located on opposite sides of the first support swing arm in the axial direction, this embodiment provides a first movable frame that extends across the first side of the first support swing arm to the second side, so that it engages with the rotating part and the second end of the first elastic member respectively. Thus, when the rotating part rotates with the damping swing arm, the movement in the axial direction drives the second end of the first elastic member to move relative to the first end of the first elastic member along the moving direction of the first movable frame, causing the first elastic member to deform and provide damping force to the damping swing arm.

[0013] As can be seen, in this embodiment, by setting the first movable frame so that the first elastic element moves to the second side of the first support swing arm, the damping force of the swing arm can still be damped. The setting of the first movable frame provides support for the first elastic element to move to the second side of the first support swing arm.

[0014] In some embodiments of this application, the folding hinge includes a second support arm spaced apart from the first support arm in the axial direction. The second support arm is rotatably connected to the base. A rotating part is located between the first and second support arms, a first side of the first support arm being the side closer to the second support arm, and a second side of the first support arm being the side farther away from the second support arm.

[0015] In related technologies, all components of the first damping assembly are distributed between the first and second support arms, resulting in a relatively large gap between them. It is understandable that this large gap leads to a greater intrusion of external impact into the damping arm area during a drop, making it easier for the base to compress the foldable display screen it supports at that location, causing it to fail. Therefore, the impact resistance reliability of this folding hinge is negatively affected by the large gap between the first and second support arms.

[0016] In this folding hinge, the first elastic element in the first damping assembly moves to the second side of the first support arm. Compared to related technologies, the gap between the first and second support arms is smaller, at least reducing the length of the first elastic element. In this configuration, the support effect of the first and second support arms on the base is better at the location of the damping arm. External impacts such as drops cause less intrusion into the location of the damping arm, making it less likely for the base to crush the foldable display it supports at that position. Therefore, the impact resistance reliability of this folding hinge is improved due to the reduced gap between the first and second support arms.

[0017] In some embodiments of this application, the rotating part has a first end and a second end disposed opposite to each other in the axial direction, with the first end of the rotating part facing the first support swing arm. The second end of the first movable frame extends between the rotating part and the first support swing arm, and engages with the first end of the rotating part.

[0018] This embodiment provides a first layout scheme for the second end of the first movable frame in the folding hinge, which provides positional support for the second end of the first movable frame in the first damping assembly to cooperate with the rotating part.

[0019] In some embodiments of this application, the base includes a first limiting portion, which is spaced apart and disposed on the second side of the first support swing arm. A first elastic member is located between the first support swing arm and the first limiting portion, with a first end of the first elastic member abutting against the first limiting portion and a second end of the first elastic member facing the first support swing arm. A first end of the first movable frame extends between the first elastic member and the first support swing arm, abutting against the second end of the first elastic member.

[0020] This embodiment, based on the previous embodiment, provides a first layout scheme for the first elastic element and the first end of the first movable frame in the folding hinge. This first layout scheme provides positional support for the first elastic element in the aforementioned first damping assembly to cooperate with the base and the first end of the first movable frame, respectively.

[0021] This embodiment can use compression of the second end of the first elastic element, rather than stretching, to move the second end of the first elastic element along the moving direction. In this case, the second end of the first elastic element and the first end of the first movable frame only need to abut against each other (referred to as abutment) to meet the fitting requirements; connection between the two is not required. Furthermore, the first end of the first movable frame moves towards the first elastic element, pushing it so that the first end of the first elastic element presses against the first limiting part, thereby achieving a limiting fit. In this case, the first end of the first elastic element and the first limiting part only need to abut against each other to meet the limiting fit requirements; connection between the two is not required. Therefore, in the first layout scheme provided by this embodiment, the first elastic element can be a compression spring.

[0022] In some embodiments of this application, the rotating part has a first end and a second end disposed opposite to each other in the axial direction, with the first end of the rotating part facing away from the first support arm. The second end of the first movable frame extends to the side of the rotating part facing away from the first support arm and engages with the first end of the rotating part.

[0023] This embodiment provides a second layout for the second end of the first movable frame in the folding hinge. This second layout provides positional support for the second end of the first movable frame in the aforementioned first damping assembly to cooperate with the rotating part.

[0024] In some embodiments of this application, the base includes a first limiting portion disposed on the second side of the first supporting swing arm. A first elastic member is disposed on the side of the first limiting portion opposite to the first supporting swing arm, with a first end abutting against the first limiting portion and a second end of the first elastic member facing away from the first limiting portion. A first end of the first movable frame extends to the side of the first elastic member opposite to the first limiting portion and abuts against the second end of the first elastic member.

[0025] This embodiment, based on the previous embodiment, provides a second layout scheme for the first elastic element and the first end of the first movable frame in the folding hinge. This second layout scheme provides positional support for the first elastic element in the aforementioned first damping assembly to cooperate with the base and the first end of the first movable frame, respectively.

[0026] This embodiment can use compression of the second end of the first elastic element, rather than stretching, to move the second end of the first elastic element along the moving direction. In this case, the second end of the first elastic element and the first end of the first movable frame only need to abut against each other (referred to as abutment) to meet the fitting requirements; connection between the two is not required. Furthermore, the first end of the first movable frame moves towards the first elastic element, pushing it so that the first end of the first elastic element presses against the first limiting part, thereby achieving a limiting fit. In this case, the first end of the first elastic element and the first limiting part only need to abut against each other to meet the limiting fit requirements; connection between the two is not required. Therefore, in the first layout scheme provided by this embodiment, the first elastic element can be a compression spring.

[0027] In some embodiments of this application, the base includes a first driving part; a first end of the first driving part engages with a second end of the rotating part, and the second end of the first driving part extends away from the rotating part. When the rotating part rotates with the damping swing arm, the rotating part, in coordination with the first driving part, drives the damping swing arm to move relative to the base along the axial direction with the first moving frame, so as to drive the second end of the first elastic member to move relative to the first end of the first elastic member along the moving direction of the first moving frame.

[0028] In this embodiment, based on the rotating part driving the first moving frame to move in the axial direction, a first driving part is set to drive the rotating part to move the damping swing arm and the first moving frame in the axial direction, so that the second end of the first elastic element can move a larger amount of movement along the moving direction of the first moving frame, such as reaching double the amount of movement, thereby providing a better damping effect.

[0029] It is understandable that, in order to support a greater range of motion, this embodiment requires a longer first elastic element. In this case, moving the longer first elastic element to the second side of the first support arm can shorten the distance by a greater amount, thereby further improving the impact resistance reliability of the folding hinge.

[0030] In some embodiments of this application, the first end of the rotating part includes a plurality of first protrusions; the second end of the first movable frame includes a plurality of second protrusions; the second end of the rotating part includes a plurality of third protrusions; and the first driving part includes a plurality of fourth protrusions. The plurality of first, second, third, and fourth protrusions are arranged in a ring-shaped, spaced array with a straight line in the axial direction as their center line, and each gradually narrows along the protrusion direction to form a first inclined surface and a second inclined surface distributed in opposite directions in the ring direction, and a protruding top between the first and second inclined surfaces. The plurality of first and second protrusions are alternately arranged with their protruding tops facing each other, and the plurality of third and fourth protrusions are alternately arranged with their protruding tops facing each other. When the damping swing arm rotates towards the base, the first protrusion switches from a first abutting state to a second abutting state via a first intermediate state, and the third protrusion switches from a third abutting state to a fourth abutting state via a second intermediate state. The first contact state is when the second inclined surface of the first protrusion abuts against the first inclined surface of the second protrusion; the second contact state is when the first inclined surface of the first protrusion abuts against the second inclined surface of the second protrusion; the first intermediate state is when the top of the second protrusion abuts against the top of the first protrusion; the third contact state is when the first inclined surface of the third protrusion abuts against the second inclined surface of the fourth protrusion; the fourth contact state is when the second inclined surface of the third protrusion abuts against the first inclined surface of the fourth protrusion; the second intermediate state is when the top of the third protrusion abuts against the top of the fourth protrusion. Wherein, when the second protrusion is in the first intermediate state, the third protrusion is also in the second intermediate state.

[0031] In this embodiment, when the first protrusion is in the first intermediate state, the third protrusion is also in the second intermediate state, which allows the movement of the second end of the first elastic member under the drive of the first driving part and the movement under the drive of the rotating part to be superimposed.

[0032] In some embodiments of this application, the side of the second support arm away from the first support arm is designated as the second side of the second support arm; the folding hinge further includes second damping components spaced apart from the first damping components along the axial direction. The first end of the second damping component engages with the rotating part; the second end of the second damping component is located on the second side of the second support arm and engages with the base for limiting. When the rotating part rotates with the damping arm, the first end of the second damping component moves relative to the second end of the second damping component along the axial direction. The movement directions of the first end of the second damping component and the first end of the first damping component are opposite.

[0033] In this embodiment, the first end of the added second damping component can move in opposite directions to the first end of the first damping component to provide damping force to the damping swing arm, thereby achieving a better damping effect. With the addition of the second damping component to improve the damping effect, in this embodiment, the second end of the second damping component is located on the second side of the second support swing arm, that is, a portion of the second damping component is moved to the second side of the second support swing arm. This further reduces the distance between the first and second support swing arms, thereby improving the impact resistance reliability of the folding hinge.

[0034] In some embodiments of this application, the second damping assembly includes a second movable frame and a second elastic member; the second elastic member is located on the second side of the second support swing arm, the first end of the second elastic member forms the second end of the second damping assembly and is limited by the base, the second end of the second elastic member is engaged with the first end of the second movable frame, the second end of the second movable frame forms the first end of the second damping assembly and is engaged with the rotating part, the first end and the second end of the second elastic member are arranged opposite to each other in the axial direction; when the rotating part rotates with the damping swing arm, the first end of the second elastic member is limited by the base, and the second movable frame moves relative to the base in the axial direction to drive the second end of the second elastic member to move relative to the first end of the second elastic member in the moving direction of the second movable frame.

[0035] In this embodiment, the second elastic element in the second damping assembly is disposed on the second side of the second support swing arm. The distance between the first support swing arm and the damping swing arm can be further shortened, with the further shortening amount being at least the length of the second elastic element, thereby improving the impact reliability of the folding hinge. The technical effect of setting the second movable frame in this embodiment can be adapted to the aforementioned description of the technical effect of setting the first movable frame, and will not be repeated here.

[0036] In some embodiments of this application, the first end of the rotating part faces the first supporting swing arm, and the second end of the rotating part faces the second supporting swing arm. The second end of the first movable frame extends between the rotating part and the first supporting swing arm, and engages with the first end of the rotating part. The second end of the second movable frame extends between the rotating part and the second supporting swing arm, and engages with the second end of the rotating part.

[0037] This embodiment provides a first layout scheme for the rotating part, the second end of the first movable frame, and the second end of the second movable frame in a folding hinge. In this first layout scheme, the second ends of the first and second movable frames respectively cooperate with the rotating part to provide positional support. For specific analysis, please refer to the foregoing related embodiments.

[0038] In this first layout scheme, the second end of the first movable frame and the second end of the second movable frame are located on both sides of the rotating part in the axial direction, respectively. Therefore, the second end of the first movable frame can cooperate with the first end of the rotating part, and the second end of the second movable frame can cooperate with the second end of the rotating part, so that the first movable frame and the second movable frame can be deployed by sharing the same rotating part.

[0039] In some embodiments of this application, the base includes a first limiting portion and a second limiting portion. The first limiting portion is spaced apart and disposed on the second side of the first supporting swing arm, and the second limiting portion is spaced apart and disposed on the second side of the second supporting swing arm. A first elastic member is located between the first limiting portion and the first supporting swing arm, with a first end abutting against the first limiting portion and a second end facing away from the first limiting portion. A first end of a first movable frame extends between the first elastic member and the first supporting swing arm, abutting against the second end of the first elastic member. A second elastic member is located between the second limiting portion and the second supporting swing arm, with a first end abutting against the second limiting portion and a second end facing away from the second limiting portion. A first end of a second movable frame extends between the second elastic member and the second supporting swing arm, abutting against the second end of the second elastic member.

[0040] This embodiment, based on the previous embodiment, provides a first layout scheme for the first elastic element and the first end of the first movable frame, and the second elastic element and the first end of the second movable frame in a folding hinge. This first layout scheme provides positional support for the first elastic element in cooperation with the base and the first end of the first movable frame, and the second elastic element in cooperation with the base and the first end of the second movable frame, respectively. Furthermore, in this embodiment, only abutment between the second end of the first elastic element and the first end of the first movable frame, and between the first end of the first elastic element and the first limiting part, is required; connection between the two is not required. For specific analysis, refer to the aforementioned related embodiments. Similarly, only abutment between the second end of the second elastic element and the first end of the second movable frame, and between the first end of the second elastic element and the second limiting part, is required; connection between the two is not required. Therefore, in the first layout scheme provided by this embodiment, the first elastic element and the second elastic element can be selected as compression springs.

[0041] In some embodiments of this application, the rotating portion includes a first rotating portion and a second rotating portion spaced apart in the axial direction; a first end of the first rotating portion faces a first supporting swing arm, a first end of the second rotating portion faces a second supporting swing arm, and the second ends of the first rotating portion and the second rotating portion face each other. A second end of a first movable frame extends between the first rotating portion and the second rotating portion and engages with the second end of the first rotating portion.

[0042] This embodiment provides a second layout scheme for the rotating part, the second end of the first movable frame, and the second end of the second movable frame in the folding hinge. This second layout scheme provides positional support for the second ends of the first movable frame and the second movable frame to cooperate with the rotating part, and specific analysis can be adapted to the foregoing related embodiments.

[0043] In this layout, two rotating parts are used, a first rotating part and a second rotating part that are spaced apart. In contrast, the first layout shared the same rotating part of the damping swing arm. Clearly, compared to the second layout, the first layout eliminates the need for two spaced rotating parts to accommodate the second ends of the first and second moving frames, thus reducing the distance between the first and second support swing arms and improving the impact resistance reliability of the folding hinge.

[0044] In some embodiments of this application, the base includes a first limiting portion and a second limiting portion. The first limiting portion is disposed on the second side of the first supporting swing arm, and the second limiting portion is disposed on the second side of the second supporting swing arm. A first elastic member is located on the side of the first limiting portion opposite to the first supporting swing arm, with a first end abutting against the first limiting portion and a second end facing away from the first limiting portion. A first end of a first movable frame extends to the side of the first elastic member opposite to the first limiting portion and abuts against the second end of the first elastic member. A second elastic member is located on the side of the second limiting portion opposite to the second supporting swing arm, with a first end abutting against the second limiting portion and a second end facing away from the second limiting portion. A first end of a second movable frame extends to the side of the second elastic member opposite to the second limiting portion and abuts against the second end of the second elastic member.

[0045] This embodiment, based on the previous embodiment, provides a second layout scheme for the first elastic element and the first end of the first movable frame, and the second elastic element and the first end of the second movable frame in the folding hinge. This second layout scheme provides positional support for the first elastic element to cooperate with the base and the first end of the first movable frame, and also provides positional support for the second elastic element to cooperate with the base and the first end of the second movable frame. Furthermore, in this embodiment, only abutting contact is required between the second end of the first elastic element and the first end of the first movable frame, and between the first end of the first elastic element and the first limiting part; a connection between the two is not required. For specific analysis, refer to the aforementioned related embodiments. Similarly, only abutting contact is required between the second end of the second elastic element and the first end of the second movable frame, and between the first end of the second elastic element and the second limiting part; a connection between the two is not required. For specific analysis, refer to the aforementioned related embodiments. It can be seen that in the second layout scheme provided by this embodiment, the first elastic element and the second elastic element can be selected as compression springs.

[0046] In some embodiments of this application, the damping swing arm includes a first damping swing arm and a second damping swing arm spaced apart in the axial direction; the rotating part includes a first rotating part and a second rotating part spaced apart in the axial direction; the first damping swing arm is rotatably connected to the base through the first rotating part, and the second damping swing arm is rotatably connected to the base through the second rotating part; the first rotating part has a first end and a second end disposed opposite to each other in the axial direction. The second end of the first movable frame engages with the first end of the first rotating part; the base includes a first driving part; the first end of the first driving part engages with the second end of the first rotating part, and the second end of the first driving part extends away from the first rotating part; when the first rotating part rotates with the first damping swing arm, the first rotating part moves relative to the base in the axial direction with the first movable frame, so as to drive the second end of the first elastic member to move relative to the first end of the first elastic member in the moving direction of the first movable frame; the second end of the second movable frame engages with the second rotating part.

[0047] In this embodiment, based on the first rotating part driving the first moving frame to move in the axial direction, the first driving part drives the first rotating part to move the first moving frame of the first damping swing arm and the first damping assembly in the axial direction, so that the second end of the first elastic member can move a larger amount of movement along the moving direction of the first moving frame, such as reaching double the amount of movement, thereby providing a better damping effect.

[0048] It is understood that, in order to support a greater range of motion, this embodiment requires a longer first elastic element in the first damping assembly. In this case, moving the longer first elastic element to the second side of the first support arm can shorten the distance by a greater amount, thereby further improving the impact resistance reliability of the folding hinge.

[0049] In some embodiments of this application, the first end of the first rotating part faces the first supporting swing arm; the base includes a first limiting part, which is spaced apart and disposed on the second side of the first supporting swing arm. The second end of the first movable frame extends between the first rotating part and the first supporting swing arm, and cooperates with the first end of the first rotating part; the first elastic member is located between the first supporting swing arm and the first limiting part, the first end of the first elastic member abuts against the first limiting part, and the second end of the first elastic member faces the first supporting swing arm; the first end of the first movable frame extends between the first elastic member and the first supporting swing arm, and abuts against the second end of the first elastic member.

[0050] This embodiment provides a first layout scheme for the first movable frame and the first elastic element in a folding hinge. In this embodiment, the requirement is met only by abutting between the second end of the first elastic element and the first end of the first movable frame, and between the first end of the first elastic element and the first limiting part; a direct connection between the two is not required. For specific analysis, refer to the foregoing related embodiments. It can be seen that in the first layout scheme provided by this embodiment, the first elastic element can be a compression spring.

[0051] In some embodiments of this application, the first end of the first rotating part faces away from the first supporting swing arm; the base includes a first limiting part, which is spaced apart and disposed on the second side of the first supporting swing arm. The second end of the first movable frame extends between the first rotating part and the second rotating part, and cooperates with the first end of the first rotating part; the first elastic member is located on the side of the first limiting part facing away from the first supporting swing arm, the first end of the first elastic member abuts against the first limiting part, and the second end of the first elastic member faces away from the first limiting part; the first end of the first movable frame extends to the side of the first elastic member facing away from the first limiting part, and abuts against the second end of the first elastic member.

[0052] This embodiment provides a second layout scheme for the first movable frame and the first elastic element in a folding hinge. In this embodiment, the requirement is met only by abutting between the second end of the first elastic element and the first end of the first movable frame, and between the first end of the first elastic element and the first limiting part; a direct connection between the two is not required. For specific analysis, refer to the foregoing related embodiments. It can be seen that in the second layout scheme provided by this embodiment, the first elastic element can be a compression spring.

[0053] In some embodiments of this application, the second rotating part has a first end and a second end disposed opposite to each other in the axial direction; the second end of the second movable frame engages with the first end of the second rotating part; the base further includes a second driving part; the first end of the second driving part engages with the second end of the second rotating part, and the second end of the second driving part extends away from the second rotating part and fixes the base. When the second rotating part rotates with the second damping swing arm, the arm of the second rotating part moves relative to the base along the axial direction with the second movable frame, thereby driving the second end of the second elastic member to move relative to the first end of the second elastic member along the moving direction of the second movable frame.

[0054] In this embodiment, based on the second rotating part driving the second moving frame to move in the axial direction, the second driving part drives the second rotating part to move the second damping swing arm and the second moving frame in the axial direction, so that the second end of the second elastic member can move a larger amount of movement along the moving direction of the second moving frame, such as reaching double the amount of movement, thereby providing a better damping effect.

[0055] It is understandable that, in order to support a greater range of motion, this embodiment requires a longer second elastic element. In this case, moving the longer second elastic element to the second side of the second support arm can shorten the distance by a greater amount, thereby further improving the impact resistance reliability of the folding hinge.

[0056] In some embodiments of this application, the first end of the second rotating part faces the second supporting swing arm; the base includes a second limiting part, which is spaced apart on the second side of the second supporting swing arm; the second end of the second movable frame extends between the second rotating part and the second supporting swing arm and cooperates with the first end of the second rotating part; the second elastic member is located between the second supporting swing arm and the second limiting part, the first end of the second elastic member abuts against the second limiting part, and the second end of the second elastic member faces the second supporting swing arm; the first end of the second movable frame extends between the second elastic member and the second supporting swing arm and abuts against the second end of the second elastic member.

[0057] This embodiment provides a first layout scheme for the second movable frame and the second elastic element in a folding hinge. In this embodiment, the requirement is met only by the abutment between the second end of the second elastic element and the first end of the second movable frame, and between the first end of the second elastic element and the second limiting part; a direct connection between the two is not required. For specific analysis, refer to the foregoing related embodiments. It can be seen that in the first layout scheme provided by this embodiment, the second elastic element can be a compression spring.

[0058] In some embodiments of this application, the first end of the second rotating part faces away from the second supporting swing arm; the base includes a second limiting part, which is spaced apart on the second side of the second supporting swing arm; the second end of the second movable frame extends between the first rotating part and the second rotating part, and cooperates with the first end of the second rotating part; the second elastic member is located on the side of the second limiting part facing away from the second supporting swing arm, the first end of the second elastic member abuts against the second limiting part, and the second end of the second elastic member faces away from the second limiting part; the first end of the second movable frame extends to the side of the second elastic member facing away from the second limiting part, and abuts against the second end of the second elastic member.

[0059] This embodiment provides a second layout scheme for the second movable frame and the second elastic element in a folding hinge. In this embodiment, the requirement is met only by the abutment between the second end of the second elastic element and the first end of the second movable frame, and between the first end of the second elastic element and the second limiting part; a direct connection between the two is not required. For specific analysis, refer to the foregoing related embodiments. It can be seen that in the second layout scheme provided by this embodiment, the second elastic element can be a compression spring.

[0060] In this embodiment, the pin on the first damping swing arm is inserted into the pin hole of the second damping swing arm and circumferentially clearance-fitted. While supporting the relative movement of the first damping swing arm and the second damping swing arm in the axial direction, the first damping swing arm and the second damping swing arm can rotate synchronously, thereby reducing the risk of deformation of the first housing and the second housing due to the different rotation angles of the first damping swing arm and the second damping swing arm.

[0061] In some embodiments of this application, the rotation axis and the center line extending along the axial direction of the first elastic element are not collinear. In related technologies, the rotation axis and the center line extending along the axial direction of the first elastic element are collinear, which causes the dimensional design standards of the rotating part and the dimensional design standards of the first elastic element to mutually restrict each other, increasing the manufacturing difficulty of the folding hinge. In this embodiment, the rotation axis and the center line extending along the axial direction of the first elastic element are not collinear, which eliminates the mutual restriction between the dimensional design standards of the rotating part and the dimensional design standards of the first elastic element, thereby reducing the manufacturing difficulty of the folding hinge.

[0062] In some embodiments of this application, the first movable frame includes a drive engagement portion, an extension portion, and an elastic member drive portion; the second drive portion forms the second end of the first movable frame; the first elastic member forms the first end of the first movable frame; the extension portion has a first end and a second end disposed opposite to each other in the axial direction, the first end of the extension portion is fixed to the drive engagement portion, and the second end of the extension portion is fixed to the elastic member drive portion.

[0063] In some embodiments of this application, the base has a tunnel extending in the axial direction; the tunnel is through which a first movable frame passes; and the surface of the tunnel is provided with a smooth coating. The smooth coating is a coating with a coefficient of friction below a certain threshold, for example, the threshold may be 0.15.

[0064] In this embodiment, by applying a smooth coating to the surface of the tunnel, the first moving frame directly contacts the smooth coating, which reduces the frictional force experienced by the first moving frame when it moves along the axial direction, thereby reducing the abnormal noise emitted by the first moving frame during movement and the damage caused by friction to the first moving frame.

[0065] Secondly, embodiments of this application provide a foldable electronic device. The foldable electronic device includes a folding hinge as provided in any embodiment of the first aspect. A foldable display screen is disposed on one side of the folding hinge and folds or unfolds based on the folding hinge.

[0066] The beneficial effects of the foldable electronic device provided by the embodiments of the second aspect described above can be found in the relevant description of the folding hinge in the first aspect described above, and will not be repeated here.

[0067] In some embodiments of this application, the foldable display screen includes a first display area, a second display area, and a third display area; the third display area is connected between the first display area and the second display area. The foldable electronic device also includes a first housing and a second housing; the first housing carries the first display area, the second housing carries the second display area, and a folding hinge is connected between the first housing and the second housing to carry the third display area.

[0068] In this embodiment, the third display area of ​​the foldable display screen can be bent based on the folding hinge, so that the first display area and the second display area of ​​the foldable display screen are opposite each other, thereby achieving folding; the third display area of ​​the foldable display screen can also be unfolded based on the folding hinge, so that the first display area, the third display area and the second display area of ​​the foldable display screen are at 180°, thereby achieving unfolding.

[0069] In some embodiments of this application, the folding hinge includes two first support arms and two damping arms. In the flattened state of the folding hinge, the two first support arms are each located on opposite sides of the base of the folding hinge in the width direction, and the two damping arms are each located on opposite sides in the width direction, which is perpendicular to the axial direction. One end of one first support arm facing away from the base is fixedly or rotatably connected to a first housing, and the other end of the first support arm facing away from the base is fixedly or rotatably connected to a second housing. One end of one damping arm facing away from the base is linearly slidably connected to the first housing, and the other end of the damping arm facing away from the base is linearly slidably connected to the second housing.

[0070] In this embodiment, the folding hinge is connected to the first housing via one of the first support arms and one of the damping arms, and to the second housing via the other first support arm and the other damping arm. Since both the first support arms and the damping arms are rotatably connected to the base, the first housing can rotate relative to the base based on one of the first support arms and one of the damping arms, and the second housing can rotate relative to the base based on the other first support arms and the other damping arm. This allows the foldable display screen to rotate relative to the base along with the first and second housings, thereby achieving folding or unfolding. Attached Figure Description

[0071] Figure 1 is a three-dimensional structural diagram of a foldable electronic device in a flattened state according to an embodiment of this application;

[0072] Figure 2 is a schematic diagram of the planar structure of the foldable electronic device shown in Figure 1 in the folded state;

[0073] Figure 3 is a three-dimensional structural diagram of a folding hinge in a flattened state according to an embodiment of this application;

[0074] Figure 4 is a structural decomposition diagram of the folding hinge shown in Figure 3 in the flattened state;

[0075] Figure 5 is a three-dimensional structural diagram of the folding hinge shown in Figure 3 in the folded state;

[0076] Figure 6 is a simplified schematic diagram of the folding hinge in Figure 3;

[0077] Figure 7 is a schematic diagram of a folding hinge in the related technology;

[0078] Figure 8 is a structural schematic diagram of the folding hinge shown in Figure 3 from the rear side of the base.

[0079] Figure 9 is a partial structural exploded view of the folding hinge shown in Figure 8 along the Z-axis direction.

[0080] Figure 10 is a schematic diagram of the cross-sectional structure obtained by cutting the folding hinge shown in Figure 8 along the cutting line PP;

[0081] Figure 11 is a structural schematic diagram of the first movable frame in the folding hinge shown in Figure 9;

[0082] Figure 12 is a schematic diagram of the first damping component and its cooperating structure in the folding hinge shown in Figure 9 from one view.

[0083] Figure 13 is a structural exploded view of the first moving frame and its cooperating structure in the folding hinge shown in Figure 9 from one perspective.

[0084] Figure 14 is an exploded view of the first moving frame and its cooperating structure in the folding hinge shown in Figure 9 from another perspective.

[0085] Figure 15 is a comparison diagram of the distance between the first left support arm and the second left support arm in the folding hinge shown in Figure 7 and the folding hinge shown in Figure 9.

[0086] Figure 16 is a three-dimensional structural diagram of another folding hinge provided in the embodiment of this application in the flattened state;

[0087] Figure 17 is a structural exploded view of the folding hinge shown in Figure 16 from the back side of the base.

[0088] Figure 18 is an exploded view of the first damping component and its mating structure in the folding hinge shown in Figure 17 from this perspective.

[0089] Figure 19 is an exploded view of the first damping component and its mating structure in the folding hinge shown in Figure 17 from another perspective.

[0090] Figure 20 is a comparison diagram of the spacing between the first left support arm and the second left support arm in the folding hinge shown in Figure 17, which is related to the technology.

[0091] Figure 21 is a simplified schematic diagram of another folding hinge provided in an embodiment of this application;

[0092] Figure 22 is a simplified schematic diagram of another folding hinge provided in an embodiment of this application;

[0093] Figure 23 is a simplified schematic diagram of another folding hinge provided in an embodiment of this application;

[0094] Figure 24 is a simplified schematic diagram of another folding hinge provided in an embodiment of this application;

[0095] Figure 25 is a simplified schematic diagram of another folding hinge provided in an embodiment of this application;

[0096] Figure 26 is a simplified schematic diagram of another folding hinge provided in an embodiment of this application;

[0097] Figure 27 is a simplified schematic diagram of another folding hinge provided in an embodiment of this application.

[0098] In the figures, the reference numerals are as follows: 00-Foldable electronic device; 01-Foldable display screen; 011-First display area; 012-Second display area; 013-Third display area; 02-Support device; 021-First housing; 022-Second housing; 023-Folding hinge; W1-First rotation direction; W2-Second rotation direction; 100-Base; 110-Upper base; 120-Lower base; 121-Groove; 101-Arc-shaped sliding fit part; 102-Pin; 103A-First left pin; 103B-First right pin; 104-First limiting part; 104A-First left limiting part; 104B-First right limiting part; 105-Second pin; 105A-Second left pin; 105B-Second right pin; 106-First driving part; 106A-First left... Drive unit; 106B - First right drive unit; C4 - Fourth cam base; D4 - Fourth protrusion; D41 - First inclined surface of the fourth protrusion; D42 - Second inclined surface of the fourth protrusion; D43 - Protruding top of the fourth protrusion; 107 - Second limiting unit; 107A - Second left limiting unit; 107B - Second right limiting unit; 108 - Second drive unit; 108A - Second left drive unit; 108B - Second right drive unit; 109 - Tunnel; 200-Shaft cover; 300-Connecting block; 300A-Left connecting block; 300B-Right connecting block; 301-Pin mounting position; 302-Straight groove; 400-Support swing arm; 400A1-First left support swing arm; 400B1-First right support swing arm; 400A2-Second left support swing arm; 400B2-Second right support swing arm; 401-Arc-shaped sliding part; 402-Pin sleeve; 500-Damping swing arm; 500A-Left damping swing arm; 500B-Right damping swing arm; 510A-Left damping swing arm body; 510B- Right damping swing arm body; 520-rotating part; 520A-left rotating part; 520B-right rotating part; 521A-first left cam part; 521B-first right cam part; 522A-second left cam part; 522B-second right cam part; C1-first cam base; D1-first protrusion; D11-first inclined surface of the first protrusion; D12-second inclined surface of the first protrusion; D13-protrusion top of the first protrusion; C3-third cam base; D3-third protrusion; D31-first inclined surface of the third protrusion; D32- The second inclined surface of the third protrusion; D33 - the top of the third protrusion; 520A1 - the first left rotating part; 520B1 - the first right rotating part; 520A2 - the second left rotating part; 520B2 - the second right rotating part; 500A1 - the first left damping swing arm; 500B1 - the first right damping swing arm; 500A2 - the second left damping swing arm; 500A2 - the second right damping swing arm; O1 - the first rotation axis; O2 - the second rotation axis; O3 - the first center line; O4 - the second straight line; 501 - the pin; 502 - the pin hole;600-Damping assembly; 610-Cam bracket; 620-Spring; 700-First damping assembly; 710-First moving frame; 711-First cam mating part; 711A-First left cam mating part; C2-Second cam base; D2-Second protrusion; D21-First inclined surface of the second protrusion; D22-Second inclined surface of the second protrusion; D23-Protruding top of the second protrusion; 711B-First right cam mating part; 712-Elastic element drive part; 712A-Left elastic element drive part, 712B-Right elastic element drive part; 713-Extension part; 720-First elastic element; 720A-First left elastic element; 720B-First right elastic element; 800-Second damping assembly; 810-Second moving frame; 820-Second elastic element; 820A-Second left elastic element; 820B-Second right elastic element. Detailed Implementation

[0099] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0100] In the description of this application, it should be understood that the terms "length", "width", "thickness", "top", "bottom", "inner", "outer", "upper", "lower", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0101] The terms "first," "second," etc., are used only for distinguishing descriptions and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. For example, "supporting swing arm" and "damping swing arm" are merely used to distinguish different swing arms and do not limit their order. A supporting swing arm can also be named a damping swing arm, and a damping swing arm can also be named a supporting swing arm, without departing from the scope of the various described embodiments. Furthermore, the terms "first," "second," etc., do not imply that the indicated features must be different.

[0102] In this application, unless otherwise expressly specified and limited, the terms "connected," "linked," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part. The relationship between two components defined by the terms "connected," "linked," "fixed," etc., can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0103] It should be noted that in this application, the words "in some embodiments," "exemplarily," and "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described in this application as "in some embodiments," "exemplarily," or "for example" should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of the words "in some embodiments," "exemplarily," and "for example" is intended to present the relevant concepts in a specific manner.

[0104] It should be noted that when labeling components in the figure, if there are multiple labels for the same component and some fields are the same across different labels, the most detailed label shall be used. The fields of the most detailed label shall be regarded as labels for other parts of the component. For example, in Figure 3, while 400A1 labels the first support swing arm, the field "400" in "400A1" shall be regarded as the label for the support swing arm.

[0105] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments.

[0106] This application provides a foldable electronic device. This foldable electronic device is an electronic device with a folding function. Exemplarily, the foldable electronic device can be a mobile phone, monitor, tablet computer, in-vehicle computer, desktop computer, laptop computer, handheld computer, notebook computer, ultra-mobile personal computer (UMPC), netbook, cellular phone, personal digital assistant (PDA), etc. This application does not impose any special limitations on the specific form of the aforementioned foldable electronic device. The following embodiments use a mobile phone as an example of a foldable electronic device for illustration.

[0107] Please refer to Figure 1, which is a three-dimensional structural diagram of a foldable electronic device in a flattened state according to an embodiment of this application.

[0108] The foldable electronic device 00 is a mobile phone, which approximates a rectangular flat plate shape when flattened. For ease of description in the following embodiments, an O-XYZ coordinate system is established for the foldable electronic device 00 in the flattened state shown in Figure 1, where the X-axis represents the length of the foldable electronic device 00; the Y-axis represents the width of the foldable electronic device 00; and the Z-axis represents the thickness of the foldable electronic device 00. It can be understood that in the folded state shown in Figure 2, the Y-axis represents the length of the foldable electronic device 00; the X-axis represents the width of the foldable electronic device 00; and the Z-axis represents the thickness of the foldable electronic device 00.

[0109] It is understood that the coordinate system of the foldable electronic device 00 can be flexibly set according to actual needs, and no specific limitation is made here. In some other embodiments, the shape of the foldable electronic device 00 may also be a square plate, etc.

[0110] The foldable electronic device 00 includes a foldable display screen 01 and a support device 02.

[0111] First, the foldable display screen 01 will be described by way of example.

[0112] The foldable display screen 01 is used to display images, videos, and other information. The foldable display screen 01 is a display screen with bendable characteristics.

[0113] The foldable display screen 01 includes a first display area 011, a second display area 012, and a third display area 013. The third display area 013 is connected between the first display area 011 and the second display area 012.

[0114] Of the three display areas, at least the third display area 013 is a flexible structure. Thus, the third display area 013 can be bent under external force, giving the foldable display screen 01 a bendable characteristic to support the switching between the flattened state shown in Figure 1 and the folded state shown in Figure 2.

[0115] For example, the foldable display screen 01 is entirely a flexible structure, meaning that the first display area 011, the second display area 012, and the third display area 013 are all flexible structures. For instance, when the foldable display screen 01 is an active matrix organic light emitting diode (AMOLED) display screen, since AMOLED displays are self-emissive displays and do not require a back light module (BLM), when the substrate in the AMOLED display screen is made of a flexible resin material, such as polyethylene terephthalate (PET), the AMOLED display screen can have bendable characteristics, thus being entirely a flexible structure.

[0116] For example, only the third display area 013 is a flexible structure, while the first display area 011 and the second display area 012 are rigid structures.

[0117] In the flattened state shown in Figure 1, the foldable display screen 01 is also in a flattened state. The first display area 011, the third display area 013, and the second display area 012 are arranged sequentially along the X-axis, thus the foldable electronic device 00 folds horizontally. Of course, in other embodiments, when the foldable display screen 01 is in the flattened state, the first display area 011, the third display area 013, and the second display area 012 can also be arranged sequentially along the Y-axis, thus the foldable electronic device 00 folds vertically. It should be understood that when the foldable electronic device 00 is in the flattened state shown in Figure 1, the foldable display screen 01 is also in the flattened state shown in Figure 1, thereby enabling large-screen display to provide users with richer information and a better user experience.

[0118] Next, the support device 02 will be described by way of example.

[0119] Support device 02 is used to support the foldable display screen 01.

[0120] Specifically, the foldable display screen 01 is disposed on one side of the support device 02, which specifically includes a first housing 021, a second housing 022, and a folding hinge 023. The folding hinge 023 connects the first housing 021 and the second housing 022. In the flattened state shown in Figure 1, the support device 02 is also in a flattened state. The first housing 021, the folding hinge 023, and the second housing 022 are arranged approximately sequentially in the X-axis direction, and their upper surfaces (the surfaces facing the foldable display screen 01) are approximately flush. The first housing 021 carries the first display area 011, the second housing 022 carries the second display area 012, and the folding hinge 023 connects the first housing 021 and the second housing 022, carrying the third display area 013.

[0121] In specific implementation, the first housing 021 and the second housing 022 can be the middle frame of the foldable electronic device 00, or the rear housing of the foldable electronic device 00, or a structure in which the middle frame and the rear housing are mounted together.

[0122] Please refer to Figure 2, which is a schematic diagram of the planar structure of the foldable electronic device shown in Figure 1 in the folded state.

[0123] In the folded state shown in Figure 2, the foldable display screen 01 is also in a folded state, with the third display area 013 bent so that the first display area 011 and the second display area 012 are approximately parallel and opposite to each other. Here, "approximately parallel" means that the angle between the first display area 011 and the second display area 012 is not necessarily 0°, but rather close to 0°, for example, it can be less than a certain angle (such as 15°). "Opposite" means that the display surface of the first display area 011 is opposite to the display surface of the second display area 012. In some embodiments, the third display area 013 is bent into a teardrop shape.

[0124] It should be understood that when the foldable electronic device 00 is in the folded state shown in Figure 2, the size of the foldable electronic device 00 can be reduced, making it easier for users to hold and carry, and providing users with a better user experience.

[0125] The aforementioned folding hinge 023 is an important component for enabling the folding function of the foldable electronic device 00.

[0126] When the foldable electronic device 00 switches from the flattened state shown in Figure 1 to the folded state shown in Figure 2, the first housing 021 and the second housing 022 move closer to each other and rotate based on the folding hinge 023, thereby driving the foldable display screen 01 to fold, so that the foldable display screen 01 switches from the flattened state shown in Figure 1 to the folded state shown in Figure 2.

[0127] When the foldable electronic device 00 switches from the folded state shown in Figure 2 to the flattened state shown in Figure 1, the first housing 021 and the second housing 022 rotate away from each other based on the folding hinge 023, thereby causing the foldable display screen 01 to unfold, so that the foldable display screen 01 switches from the folded state shown in Figure 2 to the flattened state shown in Figure 1.

[0128] As shown in Figure 1, when the first housing 021 and the second housing 022 are rotated to an angle of approximately 180°, the first housing 021 and the second housing 022 are flattened, and the foldable display screen 01 is in a flattened state. In this case, the folding hinge 023 supports the third display area 013 to support the flattening of the foldable display screen 01.

[0129] As shown in Figure 2, when the first housing 021 and the second housing 022 are rotated to an angle of approximately 0°, the first housing 021 and the second housing 022 come together, and the foldable display screen 01 is in a folded state. In this case, the folding hinge 023 provides screen space to avoid the third display area 013, so as to support the folding of the foldable display screen 01.

[0130] It is worth noting that the foldable electronic device 00 shown in Figure 2 is an electronic device with an inward folding design. That is, in the folded state, the foldable display screen 01 is located inside the support device 02. In this way, the foldable display screen 01 is not visible to the user, which can prevent the foldable display screen 01 from being scratched.

[0131] To improve the user's opening and closing feel when using foldable electronic devices, a damping component in the folding hinge provides damping force to the damping arm, so that the user can obtain a damping feel during the opening and closing process.

[0132] For example, please refer to Figures 3 to 5. Figure 3 is a three-dimensional structural diagram of a folding hinge in a flattened state provided by an embodiment of this application. Figure 4 is an exploded structural diagram of the folding hinge shown in Figure 3 in a flattened state. Figure 5 is a three-dimensional structural diagram of the folding hinge shown in Figure 3 in a folded state.

[0133] It should be noted that the flattened state of the folding hinge 023 refers to the state of the folding hinge 023 in the flattened state of the foldable electronic device 00 shown in Figure 1; the folded state of the folding hinge 023 refers to the state of the folding hinge 023 in the folded state of the foldable electronic device 00 shown in Figure 2. The structures shown in Figures 3 to 5 only show the part of the folding hinge 023 shown in Figures 1 and 2 that is related to the improvement of the technical solution, and do not show the complete structure. The following focuses on describing this part of the structure.

[0134] The folding hinge 023 includes a base 100, a shaft cover 200, a connecting block 300, a support swing arm 400, and a damping swing arm 500. It should be understood that the folding hinge 023 may also include more components than shown in the figure; this embodiment does not limit this. The position, connection relationship, and function of each component are described below.

[0135] The base 100 serves as a base for mounting moving parts of the folding hinge 023, such as supporting the swing arm 400, damping the swing arm 500, etc. Exemplarily, as shown in FIG4, the base 100 may include an upper base 110 and a lower base 120 disposed opposite each other in the Z-axis direction. The upper base 110 is closer to the third display area 013 shown in FIG1, and the lower base 120 is closer to the shaft cover 200.

[0136] The shaft cover 200 is located on the back side of the base 100, specifically on the side of the lower base 120 opposite to the upper base 110. It should be understood that the back side of the base 100 is the side of the base 100 that is away from the third display area 013 shown in Figure 1 in the Z-axis direction, where the Z-axis direction is the thickness direction of the base 100. The shaft cover 200 is an exterior component of the folding hinge 023, used to cover the base 100 within the folding hinge 023, etc., to ensure the aesthetic appearance of the foldable electronic device 00.

[0137] The connecting block 300 is a component of the folding hinge 023 used to connect the aforementioned first housing 021 and second housing 022. Figure 3 shows two connecting blocks 300, which will be referred to as left connecting block 300A and right connecting block 300B for easy distinction and explanation.

[0138] In the flattened state shown in Figure 3, the left connecting block 300A and the right connecting block 300B of the folding hinge 023 are located on opposite sides of the base 100 in the X-axis direction, which is the width direction of the base 100. The left connecting block 300A is used for fixed connection with the aforementioned first housing 021, and the right connecting block 300B is used for fixed connection with the aforementioned second housing 022.

[0139] Optionally, the left connecting block 300A and the first housing 021 can be separately formed and connected, for example, by fasteners (such as bolts, screws, pins, rivets, etc.); of course, in some other embodiments, the left connecting block 300A and the first housing 021 can also be a one-piece structure. Similarly, the right connecting block 300B and the second housing 022 can be separately formed and connected, or they can be a one-piece structure. The left connecting block 300A and the right connecting block 300B can be structural components of various regular or irregular shapes, such as block structures, plate structures, frame structures, etc., but are not limited to these.

[0140] The support arm 400, also known as the main arm, plays a supporting role in the folding hinge 023.

[0141] The folding hinge 023 may include multiple pairs of support arms 400 spaced apart in the Y-axis direction. Each pair of support arms 400 includes two support arms 400. In the flattened state shown in FIG3, the two support arms 400 in each pair of support arms 400 are respectively located on opposite sides of the base 100 in the X-axis direction.

[0142] Figures 3 to 5 only show two adjacent pairs of support arms 400 among multiple pairs of support arms 400. For ease of distinction and explanation, in this embodiment, the two support arms 400 in one pair of support arms 400 are respectively referred to as the first left support arm 400A1 (i.e., one of the first support arms) and the first right support arm 400B1 (i.e., the other first support arm), and the two support arms 400 in the other pair of support arms 400 are respectively referred to as the second left support arm 400A2 (i.e., the second support arm) and the second right support arm 400B2 (i.e., the second support arm).

[0143] The first left support swing arm 400A1 is located between the base 100 and the left connecting block 300A. The end of the first left support swing arm 400A1 facing the base 100 is rotatably connected to the base 100, for example, to the lower base 120; the end of the first left support swing arm 400A1 facing away from the base 100 is rotatably connected to the left connecting block 300A. The first right support swing arm 400B1 is located between the base 100 and the right connecting block 300B. The end of the first right support swing arm 400B1 facing the base 100 is rotatably connected to the base 100; the end of the first right support swing arm 400B1 facing away from the base 100 is rotatably connected to the right connecting block 300B.

[0144] The positional and connection relationships of the second left support swing arm 400A2 with the base 100 and the left connecting block 300A, and the positional and connection relationships of the second right support swing arm 400B2 with the base 100 and the right connecting block 300B, can be understood by reference.

[0145] A rotating connection refers to a connection method in which two connected components can rotate relative to each other. The meaning of "rotating connection" in other embodiments of this application can be referred to the description here.

[0146] The connection relationship of the first left support swing arm 400B1 is illustrated below as an example. The connection relationships of other support swing arms 400 can be adapted and implemented accordingly.

[0147] First, an example is given to illustrate the specific implementation method of the first left support swing arm 400B1 being rotatably connected to the base 100.

[0148] For example, the first left support swing arm 400B1 is rotatably connected to the base 100 via a virtual axis.

[0149] As shown in Figure 4, an arc-shaped sliding part 401 is provided on the first left support swing arm 400B1, and an arc-shaped sliding engagement part 101 is provided on the base 100 (specifically, the lower base 120 is rotatably connected). One of the arc-shaped sliding part 401 and the arc-shaped sliding engagement part 101 is an arc-shaped slide rail, and the other is an arc-shaped slide groove. The arc-shaped sliding part 401 and the arc-shaped sliding engagement part 101 are in sliding engagement. Sliding engagement means that the arc-shaped slide rail can slide along the groove wall of the arc-shaped slide groove inside the arc-shaped slide groove and contact the groove wall. It can be understood that the arc-shaped slide rail can be of various structural forms, such as a plate-shaped arc-shaped slide rail or a convex strip-shaped arc-shaped slide rail, but it is not limited to these; any rail that can slide along the arc-shaped track with the arc-shaped slide groove is acceptable.

[0150] It should be noted that the arc-shaped sliding part 401 and the arc-shaped sliding mating part 101 slide together, forming a structure that can be considered as a virtual axis. In this case, the first left support swing arm 400B1 and the base 100 can be considered as being rotatably connected via the virtual axis. In some other embodiments, the first left support swing arm 400B1 can also be rotatably connected to the base 100 via a real axis, and this application does not limit this aspect.

[0151] Next, an example is given to illustrate the specific implementation of the rotatable connection between the first left support swing arm 400B1 and the left connecting block 300B.

[0152] For example, the first left support swing arm 400B1 and the left connecting block 300B are rotatably connected by a real shaft.

[0153] As shown in Figure 4, a pin sleeve 402 is provided at the end of the first left support swing arm 400B1 facing away from the base 100, and a pin mounting position 301 is provided on the left connecting block 300B. In addition, the base 100 also includes a pin 102.

[0154] The pin 102 is installed at the pin mounting position 301, and the pin sleeve 402 is fitted over the pin 102 and can rotate relative to the pin 102, thereby realizing the rotatable connection between the first left support swing arm 400B1 and the left connecting block 300B. Because of the independently formed pin 102, the first left support swing arm 400B1 and the left connecting block 300B can be regarded as being connected by a solid shaft.

[0155] Of course, in other embodiments, the connection between the first left support swing arm 400B1 and the left connecting block 300B via a real shaft rotation can take other forms. For example, the pin sleeve 402 on the first left support swing arm 400B1 can be replaced with a pin 102, etc. Furthermore, it is understood that in other embodiments, the first left support swing arm 400B1 and the left connecting block 300B can also be connected via a virtual shaft rotation, and this application does not limit this aspect.

[0156] It should be noted that since the end of the first left support arm 400B1 facing away from the base 100 is rotatably connected to the left connecting block 300B, and the left connecting block 300B is fixedly connected to the first housing 021 shown in Figures 1 and 2, the end of the first left support arm 400B1 facing away from the base 100 is essentially rotatably connected to the first housing 021 via the left connecting block 300B. In this case, when subjected to external impacts such as drops, the distance between the end of the first left support arm 400B1 facing away from the base 100 and the first housing 021 shown in Figures 1 and 2 will not change. Therefore, the first left support arm 400B1 can provide support.

[0157] Of course, in some other embodiments, the end of the first left support arm 400B1 facing away from the base 100 can also be fixedly connected to the left connecting block 300B. In this case, the end of the first left support arm 400B1 facing away from the base 100 is equivalent to being fixedly connected to the first housing 021 through the left connecting block 300B. When subjected to external impacts such as drops, the distance between the end of the first left support arm 400B1 facing away from the base 100 and the first housing 021 shown in Figures 1 and 2 will not change. Therefore, the first left support arm 400B1 also plays a supporting role.

[0158] The damping swing arm 500, also known as the secondary swing arm, is distinct from the main swing arm. It primarily assists in the folding function of the folding hinge 023 and does not provide support. Because this secondary swing arm works in conjunction with the damping assembly to provide damping, it is also called the damping swing arm 500.

[0159] Figures 3 to 5 show a pair of damping swing arms 500 located between two adjacent pairs of support swing arms 400. Each pair of damping swing arms 500 comprises two damping swing arms 500. For ease of distinction and explanation, in this embodiment, the two damping swing arms 500 in the pair are referred to as the left damping swing arm 500A (i.e., one of the damping swing arms) and the right damping swing arm 500B (i.e., the other damping swing arm). In the flattened state shown in Figure 3, the two damping swing arms 500 of the pair of damping swing arms 500 are each located on opposite sides of the base 100 in the X-axis direction.

[0160] The left damping swing arm 500A is located between the base 100 and the left connecting block 300A, and the right damping swing arm 500B is located between the base 100 and the right connecting block 300B.

[0161] Referring to Figures 3 and 4, the left damping swing arm 500A includes a left damping swing arm body 510A and a left rotating part 520A. In specific implementation, the left rotating part 520A can be divided into multiple sub-rotating parts in the Y-axis direction. The left damping swing arm 500A (specifically the left damping swing arm body 510A) is rotatably connected to the base 100 (e.g., the lower base 120) around the first rotation axis O1 (i.e., the rotation axis) through the left rotating part 520A. The end of the left damping swing arm 500A (specifically the left damping swing arm body 510A) facing away from the base 100 is linearly slidably connected to the left connecting block 300A.

[0162] Referring to Figures 3 and 4, the right damping swing arm 500B includes a right damping swing arm body 510B and a right rotating part 520B. The right rotating part 520B can be divided into multiple sub-rotating parts in the Y-axis direction. The right damping swing arm 500B (specifically the right damping swing arm body 510B) is rotatably connected to the base 100 (e.g., the lower base 120) around the second rotation axis O2 (i.e., the rotation axis) through the right rotating part 520B. The end of the right damping swing arm 500B (specifically the right damping swing arm body 510B) facing away from the base 100 is linearly slidably connected to the right connecting block 300B.

[0163] It should be noted that the left damping swing arm 500A is rotatably connected to the base 100 about the first rotation axis O1 via the left rotating part 520A. This means that the left damping swing arm 500A is rotatably connected to the base 100 via the left rotating part 520A, and the left rotating part 520A can rotate relative to the base 100 about the first rotation axis O1. The meaning of the right damping swing arm 500B being rotatably connected to the base 100 about the second rotation axis O2 via the right rotating part 520B is similar.

[0164] In this embodiment, the directions of the first rotation axis O1 and the second rotation axis O2 are considered as the axial directions. It should be noted that this embodiment does not limit the axial direction to the direction of the straight line containing the first rotation axis O1 and the second rotation axis O2; it can also be the direction of other straight lines parallel to the straight line containing the first rotation axis O1 and the second rotation axis O2. In the illustrated embodiment, the axial direction is the Y-axis direction.

[0165] It should also be noted that a linear sliding connection refers to a connection method in which two connected components can slide relative to each other along a straight line.

[0166] The following example uses the right damping swing arm 500B to illustrate the connection relationship between the right damping swing arm 500B and the base 100 and the left connecting block 300B. The connection relationship between the right damping swing arm 500B and the base 100 and the right connecting block 300B can be adapted and implemented accordingly.

[0167] First, an example is given to illustrate the specific implementation of the rotatable connection between the right damping swing arm 500B and the base 100.

[0168] For example, the right damping swing arm 500B is rotatably connected to the base 100 via a real shaft.

[0169] As shown in Figure 4, the base 100 also includes a first right pin 103B. The right rotating part 520B is constructed as a pin sleeve, which is sleeved on the first right pin 103B and can rotate relative to the first right pin 103B around the second rotation axis O2, thereby realizing the rotatable connection between the right damping swing arm 500B and the base 100 around the second rotation axis O2 through the right rotating part 520B. It can be understood that the first rotation axis O1 is also the axial center line of the first right pin 103B.

[0170] Of course, in some other embodiments, the connection between the first left support swing arm 400B1 and the left connecting block 300B via a real shaft rotation can also take other forms. For example, the right rotating part 520B can be replaced with the first right pin 103B, and a pin sleeve for the right rotating part 520B to pass through can be provided on the base 100, etc. This application embodiment does not limit this.

[0171] Secondly, an exemplary description is given of the linear sliding connection between the right damping swing arm 500B and the left connecting block 300B.

[0172] As shown in Figure 4, the left connecting block 300B is provided with a straight groove 302 with its opening facing the base 100. As shown in Figures 3 and 4, the end of the right damping swing arm 500B facing away from the base 100 extends into the straight groove 302 and can slide along the groove wall of the straight groove 302 inside the straight groove 302.

[0173] It should be noted that because the end of the right damping swing arm 500B facing away from the base 100 is linearly slidably connected to the left connecting block 300B, and the left connecting block 300B is fixedly connected to the first housing 021 shown in Figures 1 and 2, the end of the right damping swing arm 500B facing away from the base 100 is essentially linearly slidably connected to the first housing 021 via the left connecting block 300B. In this situation, when subjected to external impacts such as drops, the distance between the end of the right damping swing arm 500B facing away from the base 100 and the first housing 021 shown in Figures 1 and 2 becomes relatively close, thus failing to provide support.

[0174] The following section, in conjunction with Figures 3 and 5, will explain the principle and process of relative rotation of the first housing 021 and the second housing 022 shown in Figures 1 and 2 based on the folding hinge 023.

[0175] Since the first left support swing arm 400A1, the left damping swing arm 500A, and the second left support swing arm 400A2 are all rotatably connected to the base 100, they can all be rotatably connected relative to the base 100. Furthermore, since the first housing 021 is connected to the first left support swing arm 400A1, the left damping swing arm 500A, and the second left support swing arm 400A2 via a fixedly connected left connecting block 300A, the first housing 021 can rotate relative to the base 100 based on the rotatable connection between the first left support swing arm 400A1, the left damping swing arm 500A, and the second left support swing arm 400A2 and the base 100.

[0176] Similarly, the first right support swing arm 400B1, the right damping swing arm 500B, and the second right support swing arm 400B2 can all rotate relative to the base 100. Since the second housing 022 is connected to the first right support swing arm 400B1, the right damping swing arm 500B, and the second right support swing arm 400B2 through the fixedly connected right connecting block 300B, the second housing 022 can rotate relative to the base 100 based on the rotational connection between the first right support swing arm 400B1, the right damping swing arm 500B, and the second right support swing arm 400B2 and the base 100.

[0177] Referring to Figures 1, 2, and 3, when the foldable electronic device 00 switches from the flattened state shown in Figure 1 to the folded state shown in Figure 2, the first housing 021 and the second housing 022 move closer together and rotate. The first housing 021 and the second housing 022 respectively drive the left connecting block 300A and the right connecting block 300B to move closer together and rotate. The left connecting block 300A and the right connecting block 300B can respectively drive the first left support swing arm 400A1 and the first right support swing arm 400B1 to move closer together and rotate along the first rotation direction W1, the second left support swing arm 400A2 and the second right support swing arm 400B2, and the left damping swing arm 500A and the right damping swing arm 500B to move closer together and rotate along the first rotation direction W1.

[0178] Referring to Figures 1, 2, and 5, when the foldable electronic device 00 switches from the folded state shown in Figure 2 to the flattened state shown in Figure 1, the first housing 021 and the second housing 022 rotate away from each other. The first housing 021 and the second housing 022 respectively drive the left connecting block 300A and the right connecting block 300B to rotate away from each other. The left connecting block 300A and the right connecting block 300B can respectively drive the first left support swing arm 400A1 and the first right support swing arm 400B1, the second left support swing arm 400A2 and the second right support swing arm 400B2, as well as the left damping swing arm 500A and the right damping swing arm 500B to rotate away from each other along the second rotation direction W2.

[0179] To enhance the support of the folding hinge 023, the folding hinge 023 adopts a swing arm layout scheme of support swing arm 400-damping swing arm 500-support swing arm 400. That is, the damping swing arm 500 is located between two support swing arms 400 that are spaced apart in the Y-axis direction. For example, the left damping swing arm 500A is located between the first left support swing arm 400A1 and the second left support swing arm 400A2 that are spaced apart in the Y-axis direction, and the right damping swing arm 500B is located between the first right support swing arm 400B1 and the second right support swing arm 400B2 that are spaced apart in the Y-axis direction.

[0180] Please refer to Figure 6, which is a simplified model of the swing arm layout in Figure 3. The long strip in the figure can be understood as the base 100, the two triangular support points can be understood as the locations of the supporting swing arms 400, and the arrows indicate external impacts such as drops. The location indicated by the arrows can be understood as the location of the damping swing arm 500, which is also the impact point. When an external impact acts on the location indicated by the arrow, the impact point arches upwards under the influence of the external impact. The figure uses dashed lines to illustrate the arching of the impact point.

[0181] It can be understood that the larger the distance L between the two support points, the worse the support effect of the support points on the strip at the impact position, and the greater the intrusion Δd when the impact position is subjected to external impact; conversely, the smaller the distance L between the two support points, the smaller the intrusion Δd when the impact position is subjected to external impact. It should be noted that the intrusion Δd refers to the amount of upward arching at the impact position when subjected to external impact, that is, the distance from the highest point of the dotted line to the strip.

[0182] In other words, the larger the distance L between the two support arms 400, the worse the support effect of the support arms 400 on the base 100 at the position of the damping arm 500 when subjected to external impacts caused by factors such as drops, and the larger the intrusion amount Δd of the base 100 at the position of the damping arm 500; conversely, the smaller the distance L between the two support arms 400, the smaller the intrusion amount Δd of the base 100 at the position of the damping arm 500.

[0183] As shown in Figures 1 and 2, one side of the base 100 is the third display area 013 of the foldable display screen 01. The greater the intrusion Δd of the base 100 at the position of the damping swing arm 500, the easier it is to compress the third display area 013, thus causing it to fail. Obviously, the impact reliability of such a folding hinge 023, such as its drop reliability, is too poor.

[0184] Currently, all components of the damping assembly that provide damping force to the damping swing arm 500 are located between the two supporting swing arms 400. This results in a large gap L between the two supporting swing arms 400, which in turn makes the supporting effect of the supporting swing arm 400 on the base 100 poor at the position of the damping swing arm 500, and the impact reliability of the folding hinge 023 is poor.

[0185] For example, please refer to Figure 7, which is a structural schematic diagram of a folding hinge in the related art. In this folding hinge 023, the damping component 600 includes a cam support 610 and a spring 620.

[0186] The cam support 610 and the spring 620 are both located between two adjacent pairs of support arms 400 (i.e., between the second left support arm 400A2 and the first left support arm 400A1, and between the second right support arm 400B2 and the first right support arm 400B1). One end of the cam support 610 engages with the left rotating part 520A and the right rotating part 520B, respectively, and the other end of the cam support 610 abuts against the spring 620. When the left rotating part 520A and the right rotating part 520B rotate with the left damping arm 500A and the right damping arm 500B, respectively, the rotating part 520 pushes the cam support 610 to move in the Y-axis direction, thereby pushing the movable end of the spring 620 to move to provide damping force.

[0187] Because the cam bracket 610 and spring 620 are distributed between two adjacent pairs of support arms 400, the distance L1 between the two adjacent pairs of support arms 400 is relatively large. The support effect of the support arms 400 on the base 100 is poor at the position of the damping arm 500. External impacts such as drops cause a large intrusion at the position of the damping arm 500, making it easy for the base 100 to squeeze the foldable display screen it supports at this position, causing it to fail.

[0188] To improve the impact reliability of the folding hinge 023, the component layout in the damping assembly has been adjusted in this embodiment.

[0189] For example, please refer to Figures 8 and 9. Figure 8 is a structural schematic diagram of the folding hinge 023 shown in Figure 3 from the rear side view of the base 100. Figure 9 is an exploded structural schematic diagram of the folding hinge 023 shown in Figure 8 obtained by disassembling the base 100. In Figure 9, the lower base 120 of the base 100 is disassembled along the dotted line with arrows. As can be seen from Figures 8 and 9, the folding hinge 023 includes a damping component, which is referred to as the first damping component 700 in this embodiment. For ease of showing the first damping component 700, the shaft cover 200 is removed from Figures 8 and 9 based on Figure 3.

[0190] The folding hinge 023 includes a first damping component 700.

[0191] The first end of the first damping component 700 is engaged with the left rotating part 520A and the right rotating part 520B respectively. The second end of the first damping component 700 is located on the side of the first left support swing arm 400A1 facing away from the left rotating part 520A and the side of the first right support swing arm 400A2 facing away from the right rotating part 520B, and is engaged with the base 100 for limiting.

[0192] In this embodiment, the side where the left rotating part 520A is located is referred to as the first side of the first left support swing arm 400A1, and the side of the first left support swing arm 400A1 facing away from the left rotating part 520A is referred to as the second side of the first left support swing arm 400A1; the side where the right rotating part 520B is located is referred to as the first side of the first right support swing arm 400B1, and the side of the first right support swing arm 400B1 facing away from the right rotating part 520B is referred to as the second side of the first right support swing arm 400B1. In this case, the second end of the first damping assembly 700 is located on the second side of the first left support swing arm 400A1 and the second side of the first right support swing arm 400A2, and is limited and matched with the base 100.

[0193] When the left rotating part 520A and the right rotating part 520B rotate with the left damping swing arm 500A and the right damping swing arm 500B respectively, the first end of the first damping assembly 700 moves relative to the second end of the first damping assembly 700 along the Y-axis direction.

[0194] It can be understood that in this folding hinge 023, the second end of the first damping component 700 is located on the second side of the first left support arm 400A1 and the first right support arm 400A2, meaning that a portion of the first damping component 700 has moved to the second side of the first left support arm 400A1 and the first right support arm 400A2. Compared to the folding hinge 023 shown in Figure 7, the distance between the first left support arm 400A1 and the first right support arm 400A2 is smaller. In this case, the intrusion of external impact on the location of the left damping arm 500A and the right damping arm 500B during a drop is smaller, making it less likely for the base 100 to crush the foldable display screen 01 it supports at that location. Therefore, the impact resistance reliability of this folding hinge 023 is improved.

[0195] In some embodiments of this application, the first damping component 700 includes a first movable frame 710 and a first elastic element 720.

[0196] First, let's describe the first movable frame 710.

[0197] The first movable frame 710 is a structural member capable of moving relative to the base 100 along the Y-axis direction. The first movable frame 710 passes through a tunnel 109 extending along the Y-axis direction on the base 100, with its first end extending to the side of the first left support swing arm 400A1 facing the left rotating part 520A and the side of the first right support swing arm 400B1 facing the right rotating part 520B, and its second end extending to the side of the first left support swing arm 400A1 facing away from the left rotating part 520A and the side of the first right support swing arm 400B1 facing away from the right rotating part 520B.

[0198] Optionally, as shown in FIG9, the base 100 includes an upper base 110 and a lower base 120 disposed opposite to each other in the Z-axis direction. A groove 121 is provided on the surface of the lower base 120 facing the upper base 110. As shown in FIG10, FIG10 is a schematic diagram of the cross-sectional structure obtained by cutting the folding hinge shown in FIG8 along the section line PP. When the upper base 110 and the lower base 120 are assembled, the surface of the upper base 110 facing the lower base 120 and the groove 121 on the lower base 120 enclose and form a tunnel 109. The embodiment shown in FIG10 designs the base 100 in the form of an upper base 110 and a lower base 120, which facilitates the installation of the generally "I"-shaped first movable frame 710 in the tunnel 109.

[0199] To avoid affecting the movement of the first movable frame 710, a clearance fit is made between the first movable frame 710 and the tunnel wall of the tunnel 109. In some embodiments, the surface of the tunnel 109 is provided with a smooth coating. A smooth coating refers to a coating with a coefficient of friction of less than 0.15.

[0200] It is understandable that by applying a smooth coating to the surface of the tunnel 109, the first moving frame 710 directly contacts the smooth coating, which reduces the frictional force experienced by the first moving frame 710 when it moves along the Y-axis, thereby reducing the abnormal noise emitted by the first moving frame 710 during movement and the damage caused by friction to the first moving frame 710.

[0201] It is understood that the construction of tunnel 109 is not limited to the embodiment shown in FIG10. For example, in some other embodiments, a groove may be provided on the surface of the upper base 110 facing the lower base 120, which together with the surface of the lower base 120 facing the upper base 110 to form tunnel 109. Furthermore, it is understood that the mounting method of the first movable frame 710 on the base 100 is not limited to the embodiment shown in FIG10. For example, in some other embodiments, a groove may be provided on the surface of the base 100 facing the shaft cover 200 shown in FIG3 to accommodate the first movable frame 710.

[0202] In this embodiment, the first movable frame 710 is driven to move along the Y-axis by the left rotating part 520A and the right rotating part 520B. To achieve the driving of the first movable frame 710 by the left rotating part 520A and the right rotating part 520B, referring to Figure 9, the second end of the first movable frame 710 forms the first end of the first damping assembly 700, which respectively cooperates with the left rotating part 520A and the right rotating part 520B. It should be noted that the cooperation between the second end of the first movable frame 710 and the rotating part 520 refers to the cooperation method in which the rotating part 520 can drive the first movable frame 710 to move relative to the base 100 along the Y-axis direction (Figure 9 shows the positive Y-axis direction). Subsequent discussions of the cooperation between the first movable frame 710 and the rotating part 520 can refer to this definition and will not be elaborated further.

[0203] Next, the first elastic element 720 will be explained.

[0204] Please refer to Figure 9, which shows two first elastic elements 720 spaced apart in the X-axis direction. For ease of distinction and explanation, these two first elastic elements 720 are referred to here as the first left elastic element 720A and the first right elastic element 720B, respectively. The first left elastic element 720A is located on the second side of the first left support arm 400A1; the first right elastic element 720B is located on the second side of the first right support arm 400B1.

[0205] Optionally, referring to Figure 9, the upper base 110 extends in the Y-axis direction to the second side of the first left support arm 400A1 and the second side of the first right support arm 400B1, while the lower base 120 does not extend in the Y-axis direction to the second side of the first left support arm 400A1 and the second side of the first right support arm 400B1, to reserve mounting positions for the first left elastic member 720A and the first right elastic member 720B. In this case, the first left elastic member 720A and the first right elastic member 720B can be located on the back side of the upper base 110 at the second side of the first left support arm 400A1 and the second side of the first right support arm 400B1, facing the shaft cover 200 shown in Figure 3. Of course, in some other embodiments, the first left elastic member 720A and the first right elastic member 720B can also be disposed in other positions on the base 100, as long as the first left elastic member 720A is located on the second side of the first left support swing arm 400A1 and the first right elastic member 720B is located on the second side of the first right support swing arm 400B1. This application embodiment does not limit this.

[0206] Referring to Figure 9, both the first left elastic element 720A and the first right elastic element 720B include a first end and a second end disposed opposite to each other in the Y-axis direction. In this embodiment, the first end of the first left elastic element 720A and the first end of the first right elastic element 720B are non-movable ends, forming the second end of the first damping assembly 700, which respectively engages with the base 100 in a limiting fit. The second end of the first left elastic element 720A and the second end of the first right elastic element 720B are movable ends, which respectively engage with the first end of the first movable frame 710. It should be noted that the limiting fit between the first end of the first left elastic element 720A and the base 100 refers to a fit in which the first end of the first elastic element 720 is limited by the base 100 and cannot move relative to the base 100. Subsequent fits between the first elastic element 720 and the base 100 can refer to this definition and will not be elaborated further.

[0207] The engagement between the second end of the first elastic element 720 and the first end of the first movable frame 710 refers to a engagement in which the second end of the first elastic element 720 can move relative to the base 100 along the moving direction of the first movable frame 710 when the first movable frame 710 moves along the Y-axis direction. Subsequent engagements between the second end of the first elastic element 720 and the first end of the first movable frame 710 will refer to this definition and will not be elaborated further. Subsequent embodiments will provide exemplary descriptions of specific implementations of this engagement, which will not be detailed here.

[0208] The principle by which the first damping component 700 in the folding hinge 023 shown in Figure 9 provides damping force is as follows:

[0209] When the left rotating part 520A and the right rotating part 520B rotate with the left damping swing arm 500A and the right damping swing arm 500B respectively, the first end of the first left elastic member 720A and the first end of the first right elastic member 720B are limited by the base 100. The first moving frame 710 moves relative to the base 100 along the Y-axis direction, so as to drive the second end of the first left elastic member 720A to move relative to the first end of the first left elastic member 720A along the moving direction of the first moving frame 710, and drive the second end of the first right elastic member 720B to move relative to the first end of the first right elastic member 720B along the moving direction of the first moving frame 710. It can be understood that the second ends of the first left elastic element 720A and the first right elastic element 720B move relative to their respective first ends, causing the first left elastic element 720A and the first right elastic element 720B to deform. This generates an elastic force opposite to the direction of movement, which reacts through the first moving frame 710 to the left rotating part 520A and the right rotating part 520B, respectively. This provides damping force to the left damping swing arm 500A and the right damping swing arm 500B, enabling them to provide a damping effect during the user's opening and closing process, thus providing a damped feel. It is evident that the embodiment shown in Figure 9, even when changing the positions of the first left elastic element 720A and the first right elastic element 720B to improve the impact resistance of the folding hinge 023, still provides a damping effect.

[0210] Referring to Figure 9, to enable the second end of the first movable frame 710 to engage with the left rotating part 520A and the right rotating part 520B respectively, the left rotating part 520A and the right rotating part 520B include a first end and a second end disposed opposite to each other in the Y-axis direction. The first end of the left rotating part 520A faces the first left support arm 400A1, and the second end of the left rotating part 520A faces away from the first left support arm 400A1. The second end of the right rotating part 520B faces the first right support arm 400B1, and the second end of the right rotating part 520B faces away from the first left support arm 400A1. The second end of the first movable frame 710 extends between the left rotating part 520A and the first left support arm 400A1, engaging with the first end of the left rotating part 520A, and extends between the right rotating part 520B and the first right support arm 400B1, engaging with the first end of the right rotating part 520B.

[0211] This embodiment provides a first layout scheme for the second end of the first movable frame 710 in the folding hinge 023. In this first layout scheme, since the first end of the left rotating part 520A faces the first left support swing arm 400A1, and the second end of the first movable frame 710 is located between the left rotating part 520A and the first left support swing arm 400A1, the second end of the first movable frame 710 is located on the side facing the first end of the left rotating part 520A. In this case, the second end of the first movable frame 710 is opposite to the first end of the left rotating part 520A. It can be understood that when the second end of the first movable frame 710 is opposite to the first end of the left rotating part 520A, conditions are provided for the second end of the first movable frame 710 to cooperate with the first end of the left rotating part 520A, and the second end of the first movable frame 710 can cooperate with the first end of the left rotating part 520A. It can be seen that this first layout scheme provides positional support for the cooperation between the second end of the first movable frame 710 and the left rotating part 520A in the aforementioned first damping assembly 700. Similarly, this first layout scheme also provides positional support for the second end of the first moving frame 710 in the first damping component 700 to cooperate with the right rotating part 520B.

[0212] Please continue referring to Figure 9. In order to achieve the limiting engagement between the first end of the first left elastic member 720A and the first end of the first right elastic member 720B and the base 100, the base 100 includes two first limiting portions 104 distributed in the X-axis direction. For ease of distinction and explanation, in this embodiment, these two first limiting portions 104 are referred to as the first left limiting portion 104A and the first right limiting portion 104B, respectively.

[0213] A first left limiting portion 104A is spaced apart and disposed on the second side of the first left support swing arm 400A1, and a first right limiting portion 104B is spaced apart and disposed on the second side of the first right support swing arm 400B1. A first left elastic member 720A is located between the first left support swing arm 400A1 and the first left limiting portion 104A, and a first right elastic member 720B is located between the first right support swing arm 400B1 and the first right limiting portion 104B. In this case, the first end of the first left elastic member 720A faces the first left limiting portion 104A and abuts against the first left limiting portion 104A, thereby achieving a limiting engagement with the base 100. The second end faces away from the first left limiting portion 104A and faces the first left support swing arm 400A1; the second end of the first right elastic member 720B faces the first right limiting portion 104B and abuts against the first right limiting portion 104B, thereby achieving a limiting engagement with the base 100.

[0214] In order to enable the second end of the first left elastic member 720A and the second end of the first right elastic member 720B to engage with the first end of the first movable frame 710 respectively, please refer to Figure 9. The first end of the first movable frame 710 extends between the first left elastic member 720A and the first left support swing arm 400A1, and abuts against the second end of the first left elastic member 720A; it also extends between the first right elastic member 720B and the first right support swing arm 400B1, and abuts against the second end of the first right elastic member 720B.

[0215] This embodiment provides a first layout scheme for the first left elastic member 720A, the first right elastic member 720B, and the first end of the first movable frame 710 in the folding hinge 023. In this first layout scheme, when the first left elastic member 720A is located between the mutually spaced first left limiting portion 104A and the first left support swing arm 400A1, the first end of the first left elastic member 720A can be oriented towards and opposite the first left limiting portion 104A. It can be understood that when the first end of the first left elastic member 720A is opposite to the first left limiting portion 104A, conditions are provided for the first end of the first left elastic member 720A to achieve a limiting engagement with the first left limiting portion 104A, and the first end of the first left elastic member 720A can achieve a limiting engagement with the first left limiting portion 104A. The first end of the first movable frame 710 extends between the first left elastic member 720A and the first left support swing arm 400A1, that is, it extends to the side facing the second end of the first left elastic member 720A, opposite to the second end of the first left elastic member 720A. It can be understood that when the first end of the first movable frame 710 is opposite to the second end of the first left elastic member 720A, conditions are provided for the first end of the first movable frame 710 and the second end of the first left elastic member 720A to engage, and the second end of the first left elastic member 720A can engage with the first end of the first movable frame 710.

[0216] As can be seen, this first layout provides positional support for the engagement of the first end of the first movable frame 710 with the second end of the first left elastic member 720A, and for the limiting engagement of the first end of the first left elastic member 720A with the base 100. Similarly, this first layout also provides positional support for the engagement of the first end of the first movable frame 710 with the second end of the first right elastic member 720B, and for the limiting engagement of the first end of the first right elastic member 720B with the base 100.

[0217] It should be noted that the first damping component 700 in Figure 9 adopts the first layout scheme described above, which has at least the following technical effects:

[0218] In the first layout scheme described above, the left rotating part 520A can move the second end of the first left elastic member 720A along the moving direction by compressing it rather than stretching it. In this case, the second end of the first left elastic member 720A and the first end of the first moving frame 710 only need to abut against each other (referred to as abutting) to meet the fitting requirements, and they do not need to be connected. Furthermore, the first end of the first moving frame 710 moves towards the first left elastic member 720A, pushing the first left elastic member 720A, so that the first end of the first left elastic member 720A presses against the first left limiting part 104A, thereby achieving a limiting fit. In this case, the first end of the first left elastic member 720A and the first left limiting part 104A only need to abut against each other to meet the limiting fit requirements, and they do not need to be connected. Based on this, in the first layout scheme provided by the embodiment shown in FIG7, the first left elastic member 720A can be a compression spring. Similarly, the first end of the first right elastic member 720B and the first right limiting part 104B, as well as the second end of the first right elastic member 720B and the first end of the first movable frame 710, only need to abut together to meet the limiting fit requirements. It is not required that the two are connected. The first right elastic member 720B can also be a compression spring.

[0219] Of course, in some other embodiments, when the second end of the first movable frame 710 is implemented in the folding hinge 023 using the first layout scheme described above, the first left elastic member 720A can also be located on the side of the first left limiting portion 104A facing away from the first left support arm 400A1, and the first right elastic member 720B can also be located on the side of the first right limiting portion 104B facing away from the first right support arm 400B1. In this case, the first left elastic member 720A and the first right elastic member 720B are selected as tension springs, the first end of the first left elastic member 720A and the first end of the first right elastic member 720B are fixedly connected to the first left limiting portion 104A and the first right limiting portion 104B, respectively, and the second end of the first left elastic member 720A and the second end of the first right elastic member 720B are connected to the first end of the first movable frame 710, respectively.

[0220] The principle by which the first damping component 700, which adopts the first layout scheme in Figure 9, provides damping force is as follows:

[0221] During the transition of the foldable electronic device 00 from the flattened state shown in Figure 1 to the folded state shown in Figure 2, the left rotating part 520A and the right rotating part 520B rotate relative to each other with the left damping swing arm 500A and the right damping swing arm 500B, respectively. The first end of the first left elastic member 720A and the first end of the first right elastic member 720B are limited by the base 100 and cannot move relative to the base 100. The left rotating part 520A and the right rotating part 520B first drive the first moving frame 710 to move relative to the base 100 along the positive Y-axis direction, thereby causing the second end of the first left elastic member 720A and the second end of the first right elastic member 720B to move relative to the first end of the first left elastic member 720A and the first end of the first right elastic member 720B, respectively, along the moving direction of the first moving frame 710 (here, the positive Y-axis direction), compressing the first left elastic member 720A. 0A and the first left elastic element 720A store elastic energy, causing them to generate elastic force in the opposite direction of movement (here, the negative Y-axis direction). The elastic force reacts through the first moving frame 710 to the left rotating part 520A and the right rotating part 520B, thereby providing damping force to the left damping swing arm 500A and the right damping swing arm 500B. Then, the first moving frame 710 moves in the negative Y-axis direction under the action of the elastic force applied by the first left elastic element 720A and the first right elastic element 720B. The second end of the first left elastic element 720A and the second end of the first right elastic element 720B move in the moving direction of the first moving frame 710 (here, the negative Y-axis direction). The first left elastic element 720A and the first right elastic element 720B gradually recover their deformation and release the stored elastic energy, thereby providing damping force to the left damping swing arm 500A and the right damping swing arm 500B.

[0222] The process and principle of providing damping force during the transition of the foldable electronic device 00 from the folded state shown in Figure 2 to the flattened state shown in Figure 1 are similar and will not be repeated here.

[0223] The following, with reference to Figures 11 to 15, provides an exemplary description of the specific structure and cooperation relationship of each component in the first damping assembly 700.

[0224] First, the structure of the first moving frame 710 in the first damping assembly 700 will be described with reference to Figure 11.

[0225] For example, please refer to Figure 11, which is a structural schematic diagram of the first movable frame 710 in the folding hinge 023 shown in Figure 9.

[0226] The first movable frame 710 includes two first cam mating parts 711 (i.e., drive mating parts), two elastic member drive parts 712, and an extension part 713.

[0227] Two first cam mating portions 711 are spaced apart in the X-axis direction to form the second end of the first movable frame 710. For ease of distinction and explanation, in this embodiment, the two first cam mating portions 711 are referred to as the first left cam mating portion 711A and the first right cam mating portion 711B, respectively.

[0228] Two elastic element drive portions 712 are spaced apart in the X-axis direction to form the first end of the first movable frame 710. For ease of distinction and explanation, in this embodiment, the two elastic element drive portions 712 are referred to as the left elastic element drive portion 712A and the right elastic element drive portion 712B, respectively.

[0229] The extension 713 extends in the Y-axis direction. It can be understood that the first movable frame 710 can be lengthened by extending the extension 713. The first end of the extension 713 in the Y-axis direction is fixed to the first left cam engagement portion 711A and the first right cam engagement portion 711B, respectively; the second end of the extension 713 in the Y-axis direction is fixed to the left elastic member drive portion 712A and the right elastic member drive portion 712B, respectively.

[0230] For example, the first left cam engagement portion 711A and the first right cam engagement portion 711B are each fixed to opposite sides of the first end of the extension portion 713 in the X-axis direction; the left elastic member drive portion 712A and the right elastic member drive portion 712B are each fixed to opposite sides of the second end of the extension portion 713 in the X-axis direction. The entire first movable frame 710 is approximately I-shaped.

[0231] Next, the cooperation relationship between the elastic member drive unit 712, the first elastic member 720 and the first limiting unit 104 will be explained with reference to FIG12.

[0232] For example, please refer to Figure 12, which is a structural schematic diagram of the first damping component 700 and its cooperating structure in the folding hinge 023 shown in Figure 9 from one perspective.

[0233] The first left limiting portion 104A and the left elastic member driving portion 712A are opposite to and spaced apart. The first left elastic member 720A is specifically located between the first left limiting portion 104A and the left elastic member driving portion 712A, with its first end abutting against the first left limiting portion 104A and its second end abutting against the left elastic member driving portion 712A. In this case, the second end of the first left elastic member 720A can move relative to the first end of the first left elastic member 720A under the action of the left elastic member driving portion 712A. The cooperation relationship between the right elastic member driving portion 712B, the first right elastic member 720B, and the first right limiting portion 104B is similar.

[0234] In some embodiments, referring to Figure 12, the folding hinge may further include two second pins 105 extending in the Y-axis direction, namely a second left pin 105A and a second right pin 105B. The second left pin 105A and the second right pin 105B are used to guide the first left elastic member 720A and the first right elastic member 720B, respectively.

[0235] Specifically, the left elastic element driving part 712A and the first left limiting part 104A are both provided with corresponding pin holes, and the right elastic element driving part 712B and the first right limiting part 104B are both provided with corresponding pin holes.

[0236] One end of the second left pin 105A is inserted into the pin hole of the left elastic element drive part 712A, and the other end is inserted into the pin hole of the first left limiting part 104A shown in Figure 9, for installation. One end of the second right pin 105B is inserted into the pin hole of the right elastic element drive part 712B, and the other end is inserted into the pin hole of the first right limiting part 104B shown in Figure 9, for installation. The first left elastic element 720A is sleeved on the second left pin 105A, with its first end abutting against the first left limiting part 104A and its second end abutting against the left elastic element drive part 712A. The first right elastic element 720B is sleeved on the second right pin 105B, with its first end abutting against the first right limiting part 104B and its second end abutting against the right elastic element drive part 712B.

[0237] It is understood that when the first left elastic element 720A and the first right elastic element 720B are respectively sleeved on the installed second left pin 105A and second right pin 105B, the first left elastic element 720A and the first right elastic element 720B can move on the second left pin 105A and the second right pin 105B respectively. Since the second left pin 105A and the second right pin 105B both extend along the Y-axis, the first left elastic element 720A and the first right elastic element 720B can be guided, so that the first left elastic element 720A and the first right elastic element 720B can move along the Y-axis. In this case, the center line extending along the Y-axis direction (i.e., the axial direction) of the first left elastic member 720A, the axial center line of the second left pin 105A, and the axial center line of the left elastic member drive part 712A are all on the first center line O3; the center line extending along the Y-axis direction (i.e., the axial direction) of the first right elastic member 720B, the axial center line of the second right pin 105B, and the axial center line of the right elastic member drive part 712B are all on the second center line O4.

[0238] This embodiment shows two first elastic elements 720. It is understood that in some other embodiments, the number of first elastic elements 720 may be more or less. Correspondingly, other components that correspond in number to the first elastic elements 720 may also be increased or decreased accordingly, such as the elastic element drive unit 712, the first limiting unit 104, and the second pin 105.

[0239] Furthermore, the fit relationship between the first cam fitting part 711 and the rotating part 520 will be explained with reference to Figure 12.

[0240] Please refer to Figure 12. To enable the second end of the first movable frame 710 to engage with the first end of the left rotating part 520A and the first end of the right rotating part 520B respectively, the left rotating part 520A includes a first left cam part 521A, and the right rotating part 520B includes a first right cam part 521B. The first left cam part 521A is sleeved on the first left pin 103A and can rotate around the first left pin 103A. The first right cam part 521B is sleeved on the first right pin 103B and can rotate around the first right pin 103B.

[0241] The first left cam engagement portion 711A and the first left cam portion 521A engage, thereby enabling the second end of the first movable frame 710 to engage with the first end of the left rotating portion 520A; the first right cam engagement portion 711B and the first right cam portion 521B engage, thereby enabling the second end of the first movable frame 710 to engage with the first end of the right rotating portion 520B.

[0242] In some embodiments, to guide the movement of the first movable frame 710, both the first left cam engagement portion 711A and the first right cam engagement portion 711B are constructed as pin sleeves along the Y-axis direction, respectively sleeved on the first left pin 103A and the first right pin 103B extending in the Y-axis direction. Thus, when the first left cam engagement portion 711A and the first right cam engagement portion 711B are respectively sleeved on the first left pin 103A and the first right pin 103B, the first left pin 103A and the first right pin 103B can guide the first left cam engagement portion 711A and the first right cam engagement portion 711B respectively during the movement of the first movable frame 710, causing the first movable frame 710 to move along the Y-axis direction. In this case, the rotation axis of the first left cam mating part 711A and the axial center line of the first left pin 103A are both on the first rotation axis O1; the rotation axis of the first right cam mating part 711B and the axial center line of the first right pin 103B are both on the second rotation axis O2.

[0243] Optionally, the first rotation axis O1 and the first center line O3 are not on the same straight line; the first rotation axis O1 and the second center line O4 are not on the same straight line. In related technologies, the first rotation axis O1 and the first center line O3 are on the same straight line; the first rotation axis O1 and the second center line O4 are on the same straight line, which makes the dimensional design standards of the rotating part 520 and the dimensional design standards of the first elastic element 720 mutually restrictive, increasing the processing difficulty of the folding hinge 023. However, in this embodiment, the first rotation axis O1 and the first center line O3 are not on the same straight line, and the first rotation axis O1 and the second center line O4 are not on the same straight line, which makes the dimensional design standards of the rotating part 520 and the dimensional design standards of the first elastic element 720 no longer mutually restrictive, thereby reducing the processing difficulty of the folding hinge 023. Thus, the first left elastic element 720A and the first right elastic element 720B can further move towards each other in the X-axis direction. As can be understood from Figure 3, the first left elastic element 720A and the first right elastic element 720B can move towards each other in the X-axis direction. The arc-shaped shaft cover 200 provides more space for the first left elastic element 720A and the first right elastic element 720B, and the diameter of the first left elastic element 720A and the first right elastic element 720B can be made larger, thereby providing a better damping effect.

[0244] The following explanation, in conjunction with Figures 13 and 14, will take the engagement of the first left cam mating part 711A and the first left cam part 521A as an example.

[0245] As shown in Figures 13 and 14, Figure 13 is a structural schematic diagram of the first end of the first movable frame 710 and its cooperating structure in the folding hinge 023 shown in Figure 9 from one view; Figure 14 is a structural schematic diagram of the first end of the first movable frame 710 and its cooperating structure in the folding hinge 023 shown in Figure 9 from one view.

[0246] The first left cam portion 521A includes a first cam base C1 and a plurality of first protrusions D1. The first cam base C1 has a first end and a second end disposed opposite to each other along the Y-axis direction, with the second end of the first cam base C1 facing the first left support arm 400A1. The first cam base C1 has a through hole penetrating the end faces of the first end and the second end of the first cam base C1 for the first left pin 103A to pass through. It can be understood that the through hole of the first cam base C1 extends to the end face of the second end of the first cam base C1, making the end face of the second end of the first cam base C1 annular.

[0247] Multiple first protrusions D1 are arranged in a ring-shaped, spaced array on the end face of the second end of the first cam base C1, with a straight line extending along the Y-axis as the center line. The ring-shaped, spaced array means that the reference line connecting the corresponding positions of the multiple first protrusions D1 is a ring, and any two adjacent first protrusions D1 are spaced apart along the ring direction. All the first protrusions D1 protrude away from the first cam base C1 and gradually narrow along the protrusion direction (positive Y-axis direction) to form a first inclined surface D11 and a second inclined surface D12 distributed opposite to each other along the ring direction, and a protruding top D13 between the first inclined surface D11 and the second inclined surface D12.

[0248] The first left cam mating part 711A includes a second cam base C2 and a plurality of second protrusions D2.

[0249] The second cam base C2 has a first end and a second end arranged opposite to each other along the Y-axis. The first end of the second cam base C2 faces away from the first left cam portion 521A, and the second end of the second cam base C2 faces the first left cam portion 521A. A sidewall extension 713 is fixed to the second end of the second cam base C2. The second cam base C2 has a through hole penetrating the end face of the first end and the end face of the second end of the second cam base C2 for the first left pin 103A to pass through. It can be understood that the through hole of the second cam base C2 penetrates to the end face of the second end of the first cam base C1, making the end face of the second end of the second cam base C2 annular.

[0250] Multiple second protrusions D2 are arranged in a ring-shaped, spaced array on the end face of the second end of the second cam base C2, with a straight line extending in the Y-axis direction as the center line. Each of the multiple second protrusions D2 protrudes towards the first left cam portion 521A and away from the second cam base C2, and gradually narrows along the protrusion direction (negative Y-axis direction) to form a first inclined surface D21 and a second inclined surface D22 distributed in opposite directions in a ring-shaped pattern, and a protruding top D23 between the first inclined surface D21 and the second inclined surface D22.

[0251] Multiple first protrusions D1 and multiple second protrusions D2 face each other. Facing each other means that the top protrusions D13 of the first protrusions D1 and the top protrusions D23 of the second protrusions D2 are oriented towards each other.

[0252] During the relative approach and rotation of the left damping swing arm 500A and the right damping swing arm 500B, the first protrusion D1 switches from a first contact state to a second contact state via a first intermediate state. The first contact state is when the second inclined surface D12 of the first protrusion D1 contacts the first inclined surface D21 of the second protrusion D2; the second contact state is when the first inclined surface D11 of the first protrusion D1 contacts the second inclined surface D22 of the second protrusion D2; and the first intermediate state is when the protruding top D13 of the first protrusion D1 contacts the protruding top D23 of the second protrusion D2.

[0253] During the transition from the first abutting state to the first intermediate state, the compressive force generated by the second inclined surface D12 of the first protrusion D1 abutting against the first inclined surface D21 of the second protrusion D2 gradually increases. This drives the first left cam mating part 711A to move along the first left pin 103A in the positive Y-axis direction, compressing the second end of the first left elastic member 720A and storing elastic potential energy, thereby providing damping force. When the first protrusion D1 switches to the first intermediate state, the elastic potential energy reaches its maximum. During the transition from the first intermediate state to the second abutting state, the compressive force generated by the first inclined surface D11 of the first protrusion D1 abutting against the second inclined surface D22 of the second protrusion D2 gradually decreases. Under the elastic force of the first left elastic member 720A, the first left cam mating part 711A moves along the first left pin 103A in the negative Y-axis direction. The second end of the first left elastic member 720A gradually recovers its deformation, releasing elastic potential energy, thereby providing damping force.

[0254] During the process of the left damping swing arm 500A and the right damping swing arm 500B moving closer and rotating, the first protrusion D1 switches from the second contact state to the first contact state through the first intermediate state. The process is similar and will not be described in detail here.

[0255] It should be noted that the specific implementation methods for the structure and mating relationship of the first damping component 700 can be referred to here, and will not be repeated hereafter.

[0256] In the folding hinge 023 shown in Figure 9, by moving the first left elastic member 720A and the first right elastic member 720B to the second side of the first left support arm 400A1 and the second side of the first right support arm 400B1, respectively, the distance between the first left support arm 400A1 and the left damping arm 500A, and the distance between the first right support arm 400B1 and the right damping arm 500B, are reduced. This reduction in distance at least decreases the length of the first left elastic member 720A and the first right elastic member 720B. In this case, the support effect of the first left support arm 400A1 and the first right support arm 400B1 on the base 100 is better at the positions of the left damping arm 500A and the right damping arm 500B, respectively. External impacts such as drops cause less intrusion into the positions of the left damping arm 500A and the right damping arm 500B, making it less likely for the base 100 to compress the foldable display screen it supports at these positions. It can be seen that the impact reliability of the folding hinge 023 is improved by reducing the distance between the first left support swing arm 400A1 and the left damping swing arm 500A, and between the first right support swing arm 400B1 and the right damping swing arm 500B.

[0257] It is understandable that, compared to the cam bracket 610 shown in Figure 7, the first moving frame 710 in the folding hinge 023 shown in Figure 9 has been lengthened so that when the first left elastic member 720A and the first right elastic member 720B are moved to the second side of the first left support arm 400A1 and the second side of the first right support arm 400B1 respectively, the first end of the first moving frame 710 can still cooperate with the second end of the first left elastic member 720A and the second end of the first right elastic member 720B respectively.

[0258] Furthermore, when the left damping swing arm 500A is located between the first left support swing arm 400A1 and the second left support swing arm 400A2, and the right damping swing arm 500B is located between the first right support swing arm 400B1 and the second right support swing arm 400B2, the left rotating part 520A of the left damping swing arm 500A is naturally also located between the first left support swing arm 400A1 and the second left support swing arm 400A2, and the right rotating part 520B of the right damping swing arm 500B is naturally also located between the first right support swing arm 400B1 and the second right support swing arm 400B2.

[0259] In this configuration, the first side of the first left support arm 400A1 is the side of the first left support arm 400A1 closest to the second left support arm 400A2, and the second side of the first left support arm 400A1 is the side of the first left support arm 400A1 furthest from the second left support arm 400A2; similarly, the first side of the first right support arm 400B1 is the side of the first right support arm 400B1 closest to the second right support arm 400B2, and the second side of the first right support arm 400B1 is the side of the first right support arm 400B1 furthest from the second right support arm 400B2. Furthermore, this application embodiment also relates to the first and second sides of the second left support arm 400A2 and the first and second sides of the second right support arm 400B2, which can be adapted for understanding.

[0260] It is understandable that by moving the first left elastic element 720A and the first right elastic element 720B in the first damping assembly 700 to the second side of the first left support arm 400A1 and the second side of the first right support arm 400B1, respectively, the distance between the first left support arm 400A1 and the second left support arm 400A2, and the distance between the first right support arm 400B1 and the second right support arm 400B2, can be reduced, thereby at least reducing the length of the first left elastic element 720A and the first right elastic element 720B. In this case, the intrusion of external impacts such as drops into the positions of the left damping arm 500A and the right damping arm 500B is smaller, making it less likely for the base 100 to compress the foldable display screen it supports at that position. It can be seen that the impact reliability of the folding hinge 023 is improved by reducing the distance between the first left support arm 400A1 and the second left support arm 400A2, and between the first right support arm 400B1 and the second right support arm 400B2.

[0261] Please refer to Figure 15, which is a comparison diagram of the spacing between the first left support arm 400B1 and the second left support arm 400B2 in the folding hinge 023 shown in Figure 7 and the folding hinge 023 shown in Figure 9. Figure 15 is a comparison using a single-sided folding hinge 023.

[0262] By comparison, it can be found that compared with the distance L1 between the first left support arm 400B1 and the second left support arm 400B2 in Figure 7, the distance L2 between the first left support arm 400B1 and the second left support arm 400B2 in the folding hinge 023 shown in Figure 9 is smaller. For example, the distance L2 is reduced by 25% based on the distance L1.

[0263] To improve the damping effect, this application embodiment also provides the folding hinge 023 shown in Figure 16 based on the folding hinge 023 shown in Figure 3.

[0264] For example, please refer to Figures 16 and 17. Figure 16 is a three-dimensional structural diagram of another folding hinge provided in the embodiment of this application in the flattened state. The shaft cover 200 in Figure 3 is not shown in Figure 16. Figure 17 is an exploded structural diagram of the folding hinge 023 shown in Figure 16 from the rear side view of the base 100. Similar to Figure 9, Figure 17 also explodes the lower base 120 to show the first movable frame 710 that is covered by the base 100.

[0265] Based on Figures 3 to 14, the base 100 (specifically the upper base 110) shown in Figures 16 and 17 further includes two first driving units 106. For ease of distinction and explanation, these two first driving units 106 are referred to as the first left driving unit 106A and the first right driving unit 106B, respectively. The structure and mating relationship of the first left driving unit 106A and the first right driving unit 106B will be described in detail below. For other structural details, please refer to the relevant descriptions in Figures 3 to 14.

[0266] The first left drive unit 106A and the first right drive unit 106B are spaced apart in the X-axis direction.

[0267] The first left drive unit 106A is located on the side of the left rotation unit 520A that is away from the first left support arm 400A1, that is, the side that the second end of the left rotation unit 520A faces. The first end of the first left drive unit 106A cooperates with the second end of the left rotation unit 520A, and the second end of the first left drive unit 106A extends away from the left rotation unit 520A.

[0268] The first right drive unit 106B is located on the side of the right rotation unit 520B that faces away from the first right support arm 400B1, that is, the side that the second end of the right rotation unit 520B faces. The first end of the first right drive unit 106B cooperates with the second end of the right rotation unit 520B, and the second end of the first right drive unit 106B extends away from the right rotation unit 520B.

[0269] It should be noted that the engagement between the first end of the first left drive unit 106A and the second end of the left rotating unit 520A refers to the engagement method in which the first left drive unit 106A can drive the left rotating unit 520A to move in the Y-axis direction when the left rotating unit 520A rotates. The definition of the engagement between the first end of the first right drive unit 106B and the second end of the right rotating unit 520B is similar.

[0270] The principle by which the first damping component 700 in the folding hinge 023 shown in Figure 16 provides damping force is as follows:

[0271] When the foldable electronic device 00 switches from the flattened state shown in FIG1 to the folded state shown in FIG2, the left rotating part 520A and the right rotating part 520B rotate relative to each other with the left damping swing arm 500A and the right damping swing arm 500B. First, on the one hand, the rotation of the left rotating part 520A and the right rotating part 520B drives the first moving frame 710 to move relative to the base 100 along the positive Y-axis direction; on the other hand, the left rotating part 520A and the right rotating part 520B are driven by the first left driving part 106A and the first right driving part 106B respectively, thereby causing the left damping swing arm 500A and the right damping swing arm 500B to move relative to the base 100 along the positive Y-axis direction with the first moving frame 710. The first movable frame 710 moves relative to the base 100 along the positive Y-axis direction, causing the second ends of the first left elastic member 720A and the second ends of the first right elastic member 720B to move relative to the first ends of the first left elastic member 720A and the first right elastic member 720B respectively along the moving direction of the first movable frame 710 (the positive Y-axis direction here). This generates an elastic force opposite to the moving direction (the negative Y-axis direction here), compressing the second ends of the first left elastic member 720A and the first right elastic member 720B, storing elastic potential energy. The elastic force reacts through the first movable frame 710 on the left rotating part 520A and the right rotating part 520B. 20B, thereby providing damping force to the left damping swing arm 500A and the right damping swing arm 500B; then, the first moving frame 710 moves along the negative Y-axis direction under the elastic force applied by the first left elastic member 720A and the first right elastic member 720B. The second end of the first left elastic member 720A and the second end of the first right elastic member 720B move along the moving direction of the first moving frame 710 (here, the negative Y-axis direction). The first left elastic member 720A and the first right elastic member 720B gradually recover their deformation and release the stored elastic energy, thereby providing damping force to the left damping swing arm 500A and the right damping swing arm 500B.

[0272] The process and principle of providing damping force for the foldable electronic device 00 to switch from the folded state shown in Figure 2 to the flattened state shown in Figure 1 are similar and will not be described again here.

[0273] As can be seen from the above, unlike the folding hinge 023 shown in Figure 9, the folding hinge 023 shown in Figure 17, in addition to the rotating part 520 driving the first moving frame 710 to move along the Y-axis, adds a first driving part 106 to drive the rotating part 520 to move the damping swing arm 500 along the Y-axis. The rotating part 520, moving along the Y-axis, further drives the first moving frame 710 to move along the Y-axis. Under the dual drive of the rotating part 520 and the first driving part 106, the first moving frame 710 moves along the Y-axis, thereby allowing the second end of the first elastic element 720 to move a larger amount along the moving direction of the first moving frame 710, such as doubling the amount of movement, thus providing a better damping effect.

[0274] It should be noted that the rotating part 520 in this embodiment can drive the damping swing arm 500 to move along the Y-axis direction. Therefore, in order not to interfere with the movement of the damping swing arm 500 in the Y-axis direction, the damping swing arm 500 has a margin of movement in the Y-axis direction. For example, the linear groove 302 provided on the aforementioned left connecting block 300A is wider in the Y-axis direction than the left damping swing arm 500A, so that after the left damping swing arm 500A extends into the linear groove 302, there is a gap between it and the groove wall of the linear groove 302, thereby providing a margin of movement for the left damping swing arm 500A in the Y-axis direction.

[0275] The following description, in conjunction with Figures 18 and 19, provides an exemplary embodiment of the specific implementation in which the first end of the first driving part 106 engages with the second end of the rotating part 520.

[0276] For example, please refer to Figures 18 and 19. Figure 18 is an exploded view of the first damping component 700 and its cooperating structure in the folding hinge 023 shown in Figure 17 from one perspective. Figure 19 is an exploded view of the first damping component 700 and its cooperating structure in the folding hinge 023 shown in Figure 17 from another perspective.

[0277] Both the first left drive unit 106A and the first right drive unit 106B can be constructed as cam mating parts with through holes along the Y-axis direction. The other ends of the first left pin 103A and the first right pin 103B in the Y-axis direction extend into the first left drive unit 106A and the first right drive unit 106B, respectively, and the other ends of the first left pin 103A and the first right pin 103B extend into the first left cam mating part 711A and the first right cam mating part 711B, respectively, to realize the installation of the first left pin 103A and the first right pin 103B.

[0278] In addition to the first left cam portion 521A, the left rotating portion 520A also includes a second left cam portion 522A, which forms the second end of the left rotating portion 520A. The second left cam portion 522A is sleeved on the first left pin 103A and can rotate around the first left pin 103A.

[0279] In addition to the first right cam portion 521B, the right rotating portion 520B also includes a second right cam portion 522B, which forms the second end of the right rotating portion 520B. The second right cam portion 522B is sleeved on the first right pin 103B and can rotate around the first right pin 103B.

[0280] The first left drive part 106A and the second left cam part 522A engage, thereby enabling the first end of the first left drive part 106A to cooperate with the second end of the left rotating part 520A; the first right drive part 106B and the second right cam part 522B engage, thereby enabling the first end of the first right drive part 106B to cooperate with the second end of the right rotating part 520B.

[0281] The following explanation will be based on the example of the engagement of the first left drive unit 106A and the second left cam unit 522A.

[0282] As shown in Figure 18, the second left cam portion 522A includes a third cam base C3 and a plurality of third protrusions D3. The specific implementation of the third cam base C3 and the plurality of third protrusions D3 can be adapted to refer to the relevant content of the first cam base C1 and the plurality of first protrusions D1 in Figures 13 and 14. The protrusion direction of the third protrusions D3 is the positive Y-axis direction.

[0283] As shown in Figure 19, the first left drive unit 106A includes a fourth cam base C4 and a plurality of fourth protrusions D4. The fourth cam base C4 has a first end and a second end disposed opposite to each other along the Y-axis direction. The first end of the fourth cam base C4 faces the second left support arm 400A2, forming the second end of the first left drive unit 106A, and is fixed to the base 100. Specifically, the sidewall of the first end of the fourth cam base C4 is fixed to the base 100. The fourth cam base C4 has a through hole penetrating the end face of the first end and the end face of the second end of the fourth cam base C4, for the first left pin 103A to pass through. It can be understood that the through hole of the fourth cam base C4 extends to the end face of the second end of the fourth cam base C4, making the end face of the second end of the fourth cam base C4 annular.

[0284] Multiple fourth protrusions D4 are arranged in a ring-shaped, spaced array on the end face of the second end of the fourth cam base C4, centered on a straight line extending in the Y-axis direction, forming the first end of the first left drive portion 106A. The multiple fourth protrusions D4 all protrude towards the second left cam portion 522A and away from the fourth cam base C4, and all gradually narrow along the protrusion direction (positive Y-axis direction) to form a first inclined surface D41 and a second inclined surface D42 distributed in opposite directions in a ring-shaped direction, and a protruding top D43 between the first inclined surface D41 and the second inclined surface D42.

[0285] Multiple third protrusions D3 face each other and multiple fourth protrusions D4.

[0286] During the relative approach and rotation of the left damping swing arm 500A and the right damping swing arm 500B, the third protrusion D3 switches from the third contact state to the fourth contact state via the second intermediate state. The third contact state is when the first inclined surface D31 of the third protrusion D3 contacts the second inclined surface D42 of the fourth protrusion D4, the fourth contact state is when the second inclined surface D32 of the third protrusion D3 contacts the first inclined surface D41 of the fourth protrusion D4, and the second intermediate state is when the protruding top D33 of the third protrusion D3 contacts the protruding top D43 of the fourth protrusion D4.

[0287] In the third contact state, the first inclined surface D31 of the third protrusion D3 gradually increases the squeezing force applied by the fourth protrusion D4 due to its contact with the second inclined surface D42 of the fourth protrusion D4, driving the second left cam 522A to move along the first left pin 103A in the positive Y-axis direction, compressing the second end of the first left elastic member 720A, thereby providing damping force.

[0288] During the transition from the third abutment state to the second intermediate state, the first inclined surface D31 of the third protrusion D3, due to its contact with the second inclined surface D42 of the fourth protrusion D4, experiences a gradually increasing pressure exerted by the fourth protrusion D4. This drives the second left cam 522A to move along the first left pin 103A in the positive Y-axis direction, compressing the second end of the first left elastic member 720A and thus providing damping force. When the third protrusion D3 transitions to the second intermediate state, its elastic potential energy reaches its maximum. During the transition from the second intermediate state to the fourth abutment state, the pressure exerted by the second inclined surface D32 of the third protrusion D3 on the first inclined surface D41 of the fourth protrusion D4 gradually decreases. Under the elastic force of the first left elastic member 720A, the second left cam 522A moves along the first left pin 103A in the negative Y-axis direction, and the second end of the first left elastic member 720A gradually recovers its deformation, releasing elastic potential energy and thus providing damping force.

[0289] During the process of the left damping swing arm 500A and the right damping swing arm 500B moving closer and rotating, the third protrusion D3 switches from the fourth contact state to the third contact state through the second intermediate state. The process is similar and will not be described in detail here.

[0290] In this embodiment, when the first protrusion D1 is in a first intermediate state (i.e., the top of the first protrusion D1 D13 abuts against the top of the second protrusion D2 D2), the third protrusion D3 is also in a second intermediate state (i.e., the top of the third protrusion D3 D3 abuts against the top of the fourth protrusion D4 D4). In this case, the first moving frame 710 can move in the same direction along the Y-axis under the dual drive of the rotating part 520 and the first driving part 106, so that the amount of movement of the second end of the first elastic member 720 along the moving direction of the first moving frame 710 can be superimposed, for example, to achieve double the amount of movement, thereby providing a better damping effect.

[0291] It should be noted that the specific implementation of the structure of the first damping component 700 and its cooperation with the rotating part 520 can be referred to the description here, and will not be repeated hereafter.

[0292] It is understood that, in order to support a greater range of movement, this embodiment requires a longer first elastic element 720. In this case, moving the longer first elastic element 720 to the second side of the first support arm 250 can shorten the distance by a greater amount, thereby further improving the impact resistance reliability of the folding hinge 023.

[0293] In the related technology, the first left elastic element 720A and the first right elastic element 720B in the folding hinge 023 are respectively disposed between the first left support swing arm 400A1 and the second left support swing arm 400A2, and between the first right support swing arm 400B1 and the second right support swing arm 400B2.

[0294] Please refer to Figure 20, which is a comparison diagram of the spacing between the first left support arm 400A1 and the second left support arm 400A2 in the folding hinge 023 shown in Figure 17, in relation to related technologies. Figure 20 compares the single-sided structure of the folding hinge 023.

[0295] In the upper part of Figure 20, the spacing L3 represents the distance between the first left support arm 400A1 and the second left support arm 400A2 in the related art. In the lower part of Figure 20, the spacing L4 represents the distance between the first left support arm 400A1 and the second left support arm 400A2 in the folding hinge 023 shown in Figure 17. A comparison reveals that because the first left elastic element 720A is longer, the reduction in spacing L4 compared to spacing L3 is greater, for example, a reduction of 30%.

[0296] Figures 9 to 20 illustrate the first layout scheme of the first damping component 700. The second layout scheme of the first damping component 700 will now be described with reference to Figures 21 and 22.

[0297] For example, Figure 21 is a simplified structural diagram of another folding hinge provided in the flattened state according to an embodiment of this application.

[0298] Unlike the folding hinge 023 shown in Figure 9, in the folding hinge 023 shown in Figure 21, the first and second ends of the left rotating part 520A and the right rotating part 520B are reversed. That is, the first end of the left rotating part 520A faces away from the first left support arm 400A1 and towards the second left support arm 400A2, and the second end of the left rotating part 520A faces towards the first left support arm 400A1 and away from the second left support arm 400A2; the first end of the right rotating part 520B faces away from the first right support arm 400B1 and towards the second right support arm 400B2, and the second end of the right rotating part 520B faces towards the first right support arm 400B1 and away from the second right support arm 400B2.

[0299] In this configuration, the second end of the first movable frame 710 extends to the side of the left rotating part 520A facing away from the first left support arm 400A1, and engages with the first end of the left rotating part 520A, thereby achieving engagement between the second end of the first movable frame 710 and the first end of the left rotating part 520A; and extends to the side of the right rotating part 520B facing away from the first right support arm 400B1, i.e., the side facing which the first end of the right rotating part 520B is, and engages with the first end of the right rotating part 520B, thereby achieving engagement between the second end of the first movable frame 710 and the first end of the right rotating part 520B. Clearly, compared to Figure 9, the first movable frame 710 is further lengthened.

[0300] This embodiment provides a second layout scheme for the second end of the first movable frame 710 in the folding hinge 023. In this second layout scheme, since the first end of the left rotating part 520A faces away from the first left support arm 400A1, and the second end of the first movable frame 710 is located on the side of the left rotating part 520A facing away from the first left support arm 400A1, the second end of the first movable frame 710 is located on the side facing the first end of the left rotating part 520A. It can be understood that when the second end of the first movable frame 710 is opposite to the first end of the left rotating part 520A, conditions are provided for the second end of the first movable frame 710 to cooperate with the first end of the left rotating part 520A, and the second end of the first movable frame 710 can cooperate with the first end of the left rotating part 520A. It can be seen that this second layout scheme provides positional support for the cooperation between the second end of the first movable frame 710 and the left rotating part 520A in the aforementioned first damping assembly 700. Similarly, this second layout scheme also provides positional support for the second end of the first movable frame 710 in the first damping component 700 to cooperate with the right rotating part 520B.

[0301] When the first and second ends of the left rotating part 520A and the right rotating part 520B are reversed, in the folding hinge 023 shown in FIG. 21, the first left limiting part 104A is disposed on the second side of the first left support swing arm 400A1; the first right limiting part 104B is disposed on the second side of the first right support swing arm 400B1. The first left elastic member 720A is disposed on the side of the first left limiting part 104A away from the first left support swing arm 400A1, and the first end of the first left elastic member 720A faces the first left limiting part 104A and abuts against the first left limiting part 104A, thereby achieving a limiting engagement with the base 100. The first right elastic member 720B is disposed on the side of the first right limiting part 104B away from the first right support swing arm 400B1, and the first end of the first right elastic member 720B faces the first right limiting part 104B and abuts against the first right limiting part 104B, thereby achieving a limiting engagement with the base 100. In this case, the second end of the first left elastic member 720A faces away from the first left limiting portion 104A, and the second end of the first right elastic member 720B faces away from the first right limiting portion 104B.

[0302] When the first and second ends of the left rotating part 520A and the right rotating part 520B are reversed, since the second end of the first left elastic member 720A faces away from the first left limiting part 104A and the second end of the first right elastic member 720B faces away from the first right limiting part 104B, the first end of the first movable frame 710 extends to the side of the first left elastic member 720A facing away from the first left limiting part 104A, that is, the side facing which the second end of the first left elastic member 720A is, and abuts against the second end of the first left elastic member 720A, thereby realizing the engagement of the first end of the first movable frame 710 with the second end of the first left elastic member 720A; the first end of the first movable frame 710 also extends to the side of the first right elastic member 720B facing away from the first right limiting part 104B, that is, the side facing which the second end of the first right elastic member 720B is, and abuts against the second end of the first right elastic member 720B, thereby realizing the engagement of the first end of the first movable frame 710 with the second end of the first right elastic member 720B.

[0303] This embodiment provides a second layout scheme for the first left elastic member 720A, the first right elastic member 720B, and the first end of the first movable frame 710 in the folding hinge 023. In this second layout scheme, when the first left elastic member 720A is located on the side of the first left limiting portion 104A facing away from the first left support arm 400A1, the first end of the first left elastic member 720A can face the first left limiting portion 104A and be opposite to it. It can be understood that when the first end of the first left elastic member 720A is opposite to the first left limiting portion 104A, conditions are provided for the first end of the first left elastic member 720A to achieve a limiting engagement with the first left limiting portion 104A, and the first end of the first left elastic member 720A can achieve a limiting engagement with the first left limiting portion 104A. The first end of the first movable frame 710 extends to the side of the first left elastic member 720A facing away from the first left limiting portion 104A, that is, to the side facing the second end of the first left elastic member 720A, opposite to the second end of the first left elastic member 720A. It can be understood that when the first end of the first movable frame 710 is opposite to the second end of the first left elastic member 720A, conditions are provided for the first end of the first movable frame 710 and the second end of the first left elastic member 720A to engage, and the second end of the first left elastic member 720A can engage with the first end of the first movable frame 710.

[0304] As can be seen, this second layout provides positional support for the engagement of the first end of the first movable frame 710 with the second end of the first left elastic member 720A, and for the limiting engagement of the first end of the first left elastic member 720A with the base 100. Similarly, this second layout also provides positional support for the engagement of the first end of the first movable frame 710 with the second end of the first right elastic member 720B, and for the limiting engagement of the first end of the first right elastic member 720B with the base 100.

[0305] The first damping component 700 in Figure 21 adopts the second layout scheme described above, and has at least the following technical effects:

[0306] In the second layout scheme described above, the left rotating part 520A can move the second end of the first left elastic member 720A in the moving direction by compressing it rather than stretching it. In this case, the second end of the first left elastic member 720A and the first end of the first moving frame 710 only need to abut to meet the fitting requirements, and they do not need to be connected. Furthermore, the first end of the first moving frame 710 moves towards the first left elastic member 720A, pushing it so that the first end of the first left elastic member 720A presses against the first left limiting part 104A, thereby achieving a limiting fit. In this case, the first end of the first left elastic member 720A and the first left limiting part 104A only need to abut to meet the limiting fit requirements, and they do not need to be connected. Based on this, in the second layout scheme provided by the embodiment shown in Figure 21, the first left elastic member 720A can be a compression spring. Similarly, the first end of the first right elastic member 720B and the first right limiting part 104B, as well as the second end of the first right elastic member 720B and the first end of the first movable frame 710, only need to abut to meet the limiting fit requirements, and the two are not required to be connected. The first right elastic member 720B can also be a compression spring.

[0307] Of course, in some other embodiments, when the second end of the first movable frame 710 is implemented in the folding hinge 023 using the second layout scheme described above, the first left elastic member 720A can also be located on the side of the first left limiting portion 104A facing the first left support arm 400A1, and the first right elastic member 720B can also be located on the side of the first right limiting portion 104B facing away from the first right support arm 400B1. In this case, the first left elastic member 720A and the first right elastic member 720B are selected as tension springs. The first end of the first left elastic member 720A and the first end of the first right elastic member 720B are fixedly connected to the first left limiting portion 104A and the first right limiting portion 104B, respectively, and the second end of the first left elastic member 720A and the second end of the first right elastic member 720B are connected to the first end of the first movable frame 710, respectively. This application embodiment does not limit this.

[0308] The principle by which the first damping component 700, which adopts the second layout scheme in Figure 21, provides damping force is as follows:

[0309] In the folding hinge 023 shown in Figure 21, during the transition of the foldable electronic device 00 from the flattened state shown in Figure 1 to the folded state shown in Figure 2, the left rotating part 520A and the right rotating part 520B rotate relative to each other with the left damping swing arm 500A and the right damping swing arm 500B, respectively. This first drives the first moving frame 710 to move relative to the base 100 along the negative Y-axis direction, thereby causing the second ends of the first left elastic element 720A and the second ends of the first right elastic element 720B to move relative to the first ends of the first left elastic element 720A and the first right elastic element 720B, respectively, along the moving direction of the first moving frame 710 (here, the negative Y-axis direction). This compresses the first left elastic element 720A and the first right elastic element 720B, storing elastic potential energy, causing it to generate... An elastic force moving in the opposite direction (in this case, the positive Y-axis direction) reacts through the first moving frame 710 to the left rotating part 520A and the right rotating part 520B, thereby providing damping force to the left damping swing arm 500A and the right damping swing arm 500B. Then, under the action of the elastic force applied by the first left elastic member 720A and the first right elastic member 720B in the positive Y-axis direction, the first moving frame 710 moves in the positive Y-axis direction. The second end of the first left elastic member 720A and the second end of the first right elastic member 720B move in the moving direction of the first moving frame 710 (in this case, the positive Y-axis direction). The first left elastic member 720A and the first right elastic member 720B gradually recover their deformation and release their stored elastic energy, thereby providing damping force to the left damping swing arm 500A and the right damping swing arm 500B.

[0310] The process and principle of providing damping force during the transition of the foldable electronic device 00 from the folded state shown in Figure 2 to the flattened state shown in Figure 1 are similar and will not be repeated here.

[0311] As can be seen, the direction of movement of the first moving frame 710 in Figure 21 is exactly opposite to the direction of movement of the first moving frame 710 in Figure 9.

[0312] It should be noted that the above content mainly focuses on explaining the differences between the folding hinge 023 shown in Figure 21 and the folding hinge 023 shown in Figure 9. For the same and similar content, the folding hinge 023 shown in Figure 21 is not described separately. Based on this, except for separate descriptions and conflicting cases, the structure, function, positional relationship, and connection relationship of each component in the folding hinge 023 shown in Figure 21 can be adapted to the description of the relevant content in the embodiments shown in Figures 3 to 15.

[0313] To improve the damping effect, based on the same inventive concept as Figures 16 and 17, this application embodiment also provides the folding hinge 023 shown in Figure 22, based on Figure 21.

[0314] For example, FIG22 is a simplified schematic diagram of another folding hinge provided in the present application in the flattened state. Based on FIG21, the base 100 shown in FIG22 further includes two first driving parts 106 distributed at intervals in the X-axis direction, namely a first left driving part 106A and a first right driving part 106B.

[0315] When the first and second ends of the left rotating part 520A and the right rotating part 520B are reversed, the first left driving part 106A and the first right driving part 106B also change compared to the embodiments shown in FIG16 and FIG17.

[0316] Specifically, the first left drive unit 106A is located between the left rotating unit 520A and the first left support swing arm 400A1, that is, on the side facing the second end of the left rotating unit 520A. The first end of the first left drive unit 106A mates with the second end of the left rotating unit 520A, and the second end extends away from the left rotating unit 520A. The positional relationship and mating relationship of the first right drive unit 106B are similar.

[0317] The principle and technical effect of adding a first left drive unit 106A and a first right drive unit 106B to drive the rotating part 520 to provide damping force in the folding hinge 023 shown in Figure 22 can be adapted to the relevant descriptions in Figures 16 and 17. Unlike the folding hinge 023 in Figures 16 and 17, the direction of movement of the first left drive unit 106A and the first right drive unit 106B driving the first moving frame 710 in Figure 22 is opposite to the direction of movement of the first moving frame 710 driven by the first left drive unit 106A and the first right drive unit 106B in Figures 16 and 17.

[0318] It should be noted that, unlike Figure 21, the rotating part 520 in this embodiment can drive the damping swing arm 500 to move along the Y-axis. Therefore, in order not to interfere with the movement of the damping swing arm 500 in the Y-axis direction, the damping swing arm 500 has a margin of movement in the Y-axis direction. A detailed implementation of the margin of movement of the damping swing arm 500 in the Y-axis direction can be found in the relevant description in Figure 16.

[0319] The above content focuses on explaining the differences between the folding hinge 023 shown in Figure 22 and the folding hinge 023 shown in Figures 16 and 17. For the same and similar content, the description of the relevant content in the embodiments shown in Figures 16 and 17 can be used as appropriate.

[0320] The folding hinge 023 shown in Figures 3 to 22 is illustrated using a pair of damping arms 500 configured with one damping component as an example. In other embodiments, the pair of damping arms 500 may also be configured with two damping components. The following description, in conjunction with Figures 23 to 27, provides an exemplary illustration.

[0321] First, based on FIG9, this application provides a folding hinge 023 with two damping components as shown in FIG23.

[0322] For example, please refer to Figure 23, which is a simplified structural diagram of another folding hinge 023 provided in an embodiment of this application.

[0323] The folding hinge 023 shown in Figure 23 includes two damping components, namely the first damping component 700 and the second damping component 800.

[0324] The details of the first damping component 700 can be found in the descriptions in Figures 3 to 15. The following description focuses on the second damping component 800.

[0325] The first end of the second damping component 800 is engaged with the left rotating part 520A and the right rotating part 520B respectively. The second end of the second damping component 800 is located on the side of the second left support swing arm 400A2 facing away from the left rotating part 520A and the side of the second right support swing arm 400B2 facing away from the right rotating part 520B, and is engaged with the base 100 for limiting.

[0326] In this embodiment, the side of the second left support swing arm 400A2 facing away from the left rotating part 520A is referred to as the second side of the second left support swing arm 400A2; the side of the second right support swing arm 400B2 facing away from the right rotating part 520B is referred to as the second side of the second right support swing arm 400B2. In this case, the second end of the first damping assembly 700 is located on the second side of the second left support swing arm 400A2 and the second side of the second right support swing arm 400B2, and is limited and engaged with the base 100.

[0327] When the left rotating part 520A and the right rotating part 520B rotate with the left damping swing arm 500A and the right damping swing arm 500B respectively, the first end of the second damping assembly 800 moves relative to the second end of the second damping assembly 800 along the Y-axis direction.

[0328] In the folding hinge 023, the second end of the second damping component 800 is located on the second side of the first left support arm 400A1 and the first right support arm 400A2, which can reduce the gap between the first left support arm 400A1 and the first right support arm 400A2, thereby improving the impact reliability of the folding hinge 023.

[0329] In some embodiments of this application, the second damping assembly 800 includes a second movable frame 810 and two second elastic members 820. The first damping assembly 700 and the second damping assembly 800 are axially symmetrical about a straight line O5 along the X-axis direction.

[0330] Two second elastic elements 820 are distributed at intervals along the X-axis. For ease of distinction and explanation, these two second elastic elements 820 are referred to as the second left elastic element 820A and the second right elastic element 820B, respectively. The second left elastic element 820A is located on the second side of the second left support arm 400A2, and the second right elastic element 820B is located on the second side of the second right support arm 400B2.

[0331] In this embodiment, the technical effects of setting the second left elastic member 820A on the second side of the second left support arm 400A2 and setting the second right elastic member 820B on the second side of the second right support arm 400B2 can be adapted to the technical effects of setting the first left elastic member 720A on the second side of the first left support arm 400A1 and setting the first right elastic member 720B on the second side of the first right support arm 400B1 in Figure 9, which will not be repeated here.

[0332] The first end of the second left elastic member 820A and the first end of the second right elastic member 820B form the second end of the second damping assembly 800, which are respectively limited to the base 100. The second end of the second left elastic member 820A and the second end of the second right elastic member 820B are respectively engaged with the first end of the second movable frame 810. The second end of the second movable frame 810 is respectively engaged with the left rotating part 520A and the right rotating part 520B.

[0333] It should be noted that the definition and specific implementation of the limiting cooperation between the first end of the second left elastic member 820A and the first end of the second right elastic member 820B with the base 100 can be found in Figures 9 to 15, which describe the limiting cooperation between the first end of the first left elastic member 820A and the first end of the first right elastic member 820B with the base 100. Unlike Figures 3 to 15, in this embodiment, the structure in which the base 100 limits the cooperation between the second left elastic member 820A and the second right elastic member 820B consists of two second limiting portions 107 distributed in the X-axis direction, referred to as the second left limiting portion 107A and the second right limiting portion 107B, respectively.

[0334] The definition and specific implementation of the cooperation between the second end of the second left elastic member 820A and the second end of the second right elastic member 820B with the first end of the second moving frame 810 can be found in Figures 3 to 15, which describe the cooperation between the second end of the first left elastic member 720A and the second end of the first right elastic member 720B with the first moving frame 710.

[0335] The second end of the second movable frame 810 forms the first end of the second damping assembly 800, and respectively cooperates with the left rotating part 520A and the right rotating part 520B. The definition and specific implementation of the cooperation between the second end of the second movable frame 810 and the left rotating part 520A and the right rotating part 520B can be found in Figures 3 to 15, which describe the cooperation between the second end of the first movable frame 710 and the left rotating part 520A and the right rotating part 520B. Unlike Figures 3 to 15, in this embodiment, the second movable frame 810 is located on the side of the left rotating part 520A and the right rotating part 520B facing away from the first movable frame 710, and respectively cooperates with the second end of the left rotating part 520A and the second end of the right rotating part 520B. As can be seen, the second movable frame 810 and the first movable frame 710 are respectively distributed on opposite sides of a pair of rotating parts 520 (including the left rotating part 520A and the right rotating part 520B) in the Y-axis direction. Therefore, the second end of the first movable frame 710 can cooperate with the first end of the rotating part 520, and the second end of the second movable frame 810 can cooperate with the second end of the rotating part 520, so that the first movable frame 710 and the second movable frame 810 can be deployed by sharing the same pair of rotating parts 520.

[0336] The embodiment shown in Figure 23 provides a first layout scheme for the second movable frame 810 and the second elastic element 820 in the folding hinge 023. The technical effects of this first layout scheme can be referred to the relevant description of the first layout scheme of the first movable frame 710 and the first elastic element 720 in the folding hinge 023 in Figure 9 above, which will not be repeated here.

[0337] The principle by which the second damping component 800 in the folding hinge 023 shown in Figure 23 provides damping force is as follows:

[0338] During the transition of the foldable electronic device 00 from the flattened state shown in Figure 1 to the folded state shown in Figure 2, the left rotating part 520A and the right rotating part 520B rotate relative to each other with the left damping swing arm 500A and the right damping swing arm 500B, respectively. The first ends of the second left elastic member 820A and the second right elastic member 820B are limited by the base 100 and cannot move relative to the base 100. The left rotating part 520A and the right rotating part 520B first drive the second moving frame 810 to move relative to the base 100 along the negative Y-axis direction, thereby causing the second ends of the second left elastic member 820A and the second right elastic member 820B to move relative to the first ends of the second left elastic member 820A and the second right elastic member 820B, respectively, along the moving direction of the second moving frame 810 (here, the negative Y-axis direction), compressing the second left elastic member 820A. The second end and the second end of the second left elastic member 820A generate a gradually increasing elastic force opposite to the direction of movement (in this case, the positive direction of the Y-axis). This elastic force reacts through the second moving frame 810 to the left rotating part 520A and the right rotating part 520B, thereby providing damping force to the left damping swing arm 500A and the right damping swing arm 500B. Then, under the action of the elastic force applied by the first left elastic member 720A and the first right elastic member 720B in the negative direction of the Y-axis, the first moving frame 710 moves in the positive direction of the Y-axis. The second ends of the first left elastic member 720A and the first right elastic member 720B move in the direction of movement of the first moving frame 710 (in this case, the positive direction of the Y-axis). The first left elastic member 720A and the first right elastic member 720B gradually recover their deformation and release their stored elastic energy, thereby providing damping force to the left damping swing arm 500A and the right damping swing arm 500B.

[0339] The process and principle of providing damping force during the transition of the foldable electronic device 00 from the folded state shown in Figure 2 to the flattened state shown in Figure 1 are similar and will not be repeated here.

[0340] It should be noted that the principle of the damping force provided by the first damping component 700 in the folding hinge 023 shown in Figure 23 is illustrated in the relevant description in Figure 9. As can be seen from the analysis of the damping force provided by the first damping component 700 in conjunction with Figure 9, the moving direction of the second moving frame 810 in Figure 23 is opposite to the moving direction of the first moving frame 710.

[0341] The folding hinge 023 shown in Figure 23 achieves better damping effect by incorporating two damping components, a first damping component 700 and a second damping component 800. Furthermore, compared to the case where both the first elastic element 720 of the first damping component 700 and the second elastic element 820 of the second damping component 800 are located between the first and second support arms, this embodiment places the first elastic element 720 and the second damping component 800 outside the first and second support arms. This reduces the distance between the first and second support arms by the sum of the lengths of the first elastic element 720 and the second elastic element 820, thereby improving the impact resistance reliability of the folding hinge 023.

[0342] It is understood that, except in cases of separate explanation and conflict, the relevant content regarding the first damping component 700 in the embodiments shown in Figures 3 to 14 can also be applied to the second damping component 800.

[0343] Secondly, this application embodiment also provides a folding hinge 023 with two damping components as shown in FIG24, based on FIG21.

[0344] For example, please refer to Figure 24, which is a simplified schematic diagram of another folding hinge structure provided in an embodiment of this application.

[0345] The folding hinge 023 shown in Figure 24 also includes two damping components: a first damping component 700 and a second damping component 800. The first damping component 700 and the second damping component 800 are axially symmetrical about the straight line O5 along the X-axis.

[0346] Except for the following separate explanations and contradictory cases, the relevant details of the first damping component 700 can be found in the relevant description in Figure 21.

[0347] To enable the second ends of the first movable frame 710 and the second movable frame 810 to cooperate with the left rotating part 520A and the right rotating part 520B respectively, as shown in Figure 24, the left rotating part 520A includes a first left rotating part 520A1 (i.e., the first rotating part) and a second left rotating part 520A2 (i.e., the second rotating part) that are spaced apart in the Y-axis direction and are on the same rotation axis. The left damping swing arm 500A is rotatably connected to the base 100 through the first left rotating part 520A1, the second left rotating part 520A2, and the base 100. The right rotating part 520B includes a first right rotating part 520B1 (i.e., the first rotating part) and a second right rotating part 520B2 (i.e., the second rotating part) that are spaced apart in the Y-axis direction and are on the same rotation axis. The right damping swing arm 500B is rotatably connected to the base 100 through the first right rotating part 520B1, the second right rotating part 520B2, and the base 100.

[0348] The first end of the first left rotating part 520A1 faces the first left support arm 400A1, the first end of the second left rotating part 520A2 faces the second left support arm 400A2, and the second ends of the first left rotating part 520A1 and the second left rotating part 520A2 face each other. The first and second ends of the first right rotating part 520B1 and the second right rotating part 520B2 are similarly oriented.

[0349] The second end of the first movable frame 710 extends between the first left rotating part 520A1 and the second left rotating part 520A2, and engages with the second end of the first left rotating part 520A1, thereby achieving engagement with the left rotating part 520A; the second end of the first movable frame 710 also extends between the first right rotating part 520B1 and the second right rotating part 520B2, and engages with the second end of the first right rotating part 520B1, thereby achieving engagement with the right rotating part 520B.

[0350] Except for the following separate explanations and contradictory cases, the relevant details of the second damping component 800 can be found in the relevant description in Figure 23.

[0351] To enable the second end of the second movable frame 810 to engage with the left rotating part 520A and the right rotating part 520B respectively, as shown in Figure 23, the second end of the second movable frame 810 extends between the first left rotating part 520A1 and the second left rotating part 520A2, and engages with the second end of the second left rotating part 520A2, thereby engaging with the left rotating part 520A; the second end of the second movable frame 810 also extends between the first right rotating part 520B1 and the second right rotating part 520B2, and engages with the second end of the second right rotating part 520B2, thereby engaging with the right rotating part 520B.

[0352] To achieve a limiting engagement between the second end of the second elastic element 820 in the second damping assembly 800 and the base 100, as shown in Figure 23, the second left limiting portion 107A is disposed on the second side of the second left support swing arm 400A2, and the second right limiting portion 107B is disposed on the second side of the second right support swing arm 400B2. Specifically, the second left elastic element 820A is located on the side of the second left limiting portion 107A facing away from the second left support swing arm 400A2, with its first end facing and abutting against the second left limiting portion 107A, thus achieving a limiting engagement with the base 100; the second right elastic element 820B is located on the side of the second right limiting portion 107B facing away from the second right support swing arm 400B2, with its first end facing and abutting against the second right limiting portion 107B, thus achieving a limiting engagement with the base 100.

[0353] In this configuration, the second end of the second left elastic member 820A faces away from the second left limiting portion 107A, and the second end of the second right elastic member 820B faces away from the second right limiting portion 107B. The first end of the second movable frame 810 extends to the side of the second left elastic member 820A facing away from the second left limiting portion 107A, i.e., the side facing the second end of the second left elastic member 820A, and abuts against the second end of the second left elastic member 820A, thereby achieving engagement with the second end of the second left elastic member 820A; the first end of the second movable frame 810 extends to the side of the second right elastic member 820B facing away from the second right limiting portion 107B, i.e., the side facing the second end of the second right elastic member 820B, and abuts against the second end of the second right elastic member 820B, thereby achieving engagement with the second end of the second right elastic member 820B.

[0354] This embodiment provides a second layout scheme for the second movable frame 810 and the second elastic element 820 in the folding hinge 023. The technical effects of this second layout scheme can be referred to the relevant description of the second layout scheme of the first movable frame 710 and the first elastic element 720 in the folding hinge 023 in Figure 21 above, which will not be repeated here.

[0355] It should be noted that the above description focuses on the positional distribution of the components of the newly added second damping assembly 800 in the folding hinge 023 shown in Figure 24, without elaborating on the specific structure and mating relationships of the components in the second damping assembly 800. It is understood that, except for separate descriptions and conflicting situations, the relevant content regarding the first damping assembly 700 in the embodiments shown in Figures 3 to 14 can also be applied to the second damping assembly 800.

[0356] Furthermore, this application embodiment also provides a folding hinge 023 with two damping components as shown in FIG25, based on FIG17.

[0357] For example, please refer to Figure 25, which is a simplified schematic diagram of another folding hinge structure provided in an embodiment of this application.

[0358] The folding hinge 023 shown in Figure 25 also includes two damping components: a first damping component 700 and a second damping component 800. The first damping component 700 and the second damping component 800 are axially symmetrical about the straight line O5 along the X-axis.

[0359] Except in cases of separate explanation or contradiction, the relevant details of the first damping component 700 can be adapted to the relevant description in Figure 17.

[0360] Except in cases of separate explanation or contradiction, the relevant details of the second damping component 800 can be adapted to refer to the relevant description in Figure 23.

[0361] To improve the damping effect, based on the same inventive concept as Figure 17, the base 100 in Figure 25 also includes two second drive units 108 spaced apart in the X-axis direction, namely a second left drive unit 108A and a second right drive unit 108B. The functions of the second left drive unit 108A and the second right drive unit 108B are similar to those of the first left drive unit 106A and the first right drive unit 106B in Figure 17, used to drive the rotating part 520 to move the damping swing arm 500 together with the second moving frame 810. The technical effect of adding the second left drive unit 108A and the second right drive unit 108B here can be referred to the description of the technical effect of adding the first left drive unit 106A and the first right drive unit 106B in Figure 17, and will not be repeated here.

[0362] It should be noted that the moving direction of the second moving frame 810 in Figure 25 is opposite to that of the first moving frame 710. In order to support the rotating part 520 and the damping swing arm 500 to move in opposite directions with the second moving frame 810 and the first moving frame 710, the damping swing arm 500 and the rotating part 520 in Figure 25 are both split.

[0363] Specifically, the left damping swing arm 500A includes a first left damping swing arm 500A1 (i.e., the first damping swing arm) and a second left damping swing arm 500A2 (i.e., the second damping swing arm) that are spaced apart in the Y-axis direction; the right damping swing arm 500B includes a first right damping swing arm 500B1 (i.e., the first damping swing arm) and a second right damping swing arm 500B2 (i.e., the second damping swing arm) that are spaced apart in the Y-axis direction.

[0364] The left rotating part 520A includes a first left rotating part 520A1 (i.e., the first rotating part) and a second left rotating part 520A2 (i.e., the second rotating part) spaced apart in the Y-axis direction; the right rotating part 520B includes a first right rotating part 520B1 (i.e., the first rotating part) and a second right rotating part 520B2 (i.e., the second rotating part) spaced apart in the Y-axis direction. The first left damping swing arm 500A1 is rotatably connected to the base 100 via the first left rotating part 520A1; the second left damping swing arm 500A2 is rotatably connected to the base 100 via the second left rotating part 520A2; the first right damping swing arm 500B1 is rotatably connected to the base 100 via the first right rotating part 520B1; and the second right damping swing arm 500B2 is rotatably connected to the base 100 via the second right rotating part 520B2.

[0365] The first left rotating part 520A1 and the second left rotating part 520A2 each have a first end and a second end that are arranged opposite to each other in the Y-axis direction; the first right rotating part 520B1 and the second right rotating part 520B2 each have a first end and a second end that are arranged opposite to each other in the Y-axis direction. The first end of the first left rotating part 520A1 faces the first left support arm 400A1, and the second end of the first left rotating part 520A1 faces away from the first left support arm 400A1 and faces the second end of the second left rotating part 520A2. The first end of the second left rotating part 520A2 faces the second left support arm 400A2. The first end of the first right rotating part 520B1 faces the first right support arm 400B1, and the second end of the first right rotating part 520B1 faces away from the first right support arm 400B1 and faces the second end of the second right rotating part 520B2. The first end of the second right rotating part 520B2 faces the second right support arm 400B2.

[0366] First, the differences between the first damping component 700 and the two first drive units 106 compared to Figure 17 will be explained.

[0367] The second end of the first movable frame 710 extends between the first left rotating part 520A1 and the first left support swing arm 400A1, and engages with the first end of the first left rotating part 520A1, thereby achieving engagement with the left rotating part 520A; the second end of the first movable frame 710 also extends between the first right rotating part 520B1 and the first right support swing arm 400B1, and engages with the first end of the first right rotating part 520B1, thereby achieving engagement with the right rotating part 520B.

[0368] The first left drive unit 106A is located between the first left rotating unit 520A1 and the first right rotating unit 520B1, that is, on the side facing the second end of the first left rotating unit 520A1. The first end of the first left drive unit 106A engages with the second end of the first left rotating unit 520A1, and the second end of the first left drive unit 106A extends away from the first left rotating unit 520A1. The first right drive unit 106B is located between the first left rotating unit 520A1 and the first right rotating unit 520B1, that is, on the side facing the second end of the first right rotating unit 520B1. The first end of the first right drive unit 106B engages with the second end of the first right rotating unit 520B1, and the second end of the first right drive unit 106B extends away from the first right rotating unit 520B1.

[0369] Next, the second damping component 800 and the two second drive units 108 will be described.

[0370] The second end of the second movable frame 810 extends between the second left rotating part 520A2 and the second left support swing arm 400A2, and engages with the first end of the second left rotating part 520A2, thereby achieving engagement with the left rotating part 520A; the second end of the second movable frame 810 also extends between the second right rotating part 520B2 and the second right support swing arm 400B2, and engages with the first end of the second right rotating part 520B2, thereby achieving engagement with the right rotating part 520B. It should be noted that the definition of engagement and specific implementation methods here can be found in the relevant descriptions of the engagement between the second end of the second movable frame 810 and the second ends of the left rotating part 520A and the right rotating part 520B in Figure 23.

[0371] The second left drive unit 108A is located between the second left rotating unit 520A2 and the second right rotating unit 520B2, specifically on the side facing the second end of the second left rotating unit 520A2. The first end of the second left drive unit 108A engages with the second end of the second left rotating unit 520A2, and the second end of the second left drive unit 108A extends away from the second left rotating unit 520A2. Similarly, the second right drive unit 108B is located between the second left rotating unit 520A2 and the second right rotating unit 520B2, specifically on the side facing the second end of the second right rotating unit 520B2. The first end of the second right drive unit 108B engages with the second end of the second right rotating unit 520B2, and the second end of the second right drive unit 108B extends away from the second right rotating unit 520B2. It should be noted that the definition and specific implementation of this engagement can be found in the description of the engagement between the second end of the first left drive unit 106A and the left rotating unit 520A in Figures 16 to 19.

[0372] The embodiment shown in Figure 25 provides a first layout scheme for the second movable frame 810 and the second elastic element 820 in the folding hinge 023. The technical effects of this first layout scheme can be referred to the relevant description of the first layout scheme of the second movable frame 810 and the second elastic element 820 in the folding hinge 023 in Figure 23 above, and will not be repeated here.

[0373] Furthermore, the principle by which the second damping component 800 provides damping force in Figure 25 is similar to that of the first damping component 700, but the moving direction of the second moving frame 810 is opposite to that of the first moving frame 710, resulting in opposite directions of the provided damping force. The principle by which the first moving frame 710 provides damping force can be referred to the relevant description in Figure 17, and the principle by which the second damping component 800 provides damping force can be understood by adaptation. It can also be understood that the folding hinge 023 in Figure 25 is provided with two damping components, the first damping component 700 and the second damping component 800, and the first elastic element 720 of the first damping component 700 and the second elastic element 820 of the second damping component 800 are both located in areas outside the first and second support swing arms, which can reduce the distance between the first and second support swing arms, thereby improving the impact reliability of the folding hinge 023.

[0374] It should be noted that the above description focuses on the positional distribution of the components of the newly added second damping assembly 800 and the second drive unit 108 in the folding hinge 023 shown in Figure 25. Detailed implementations of the specific structures and mating relationships of the components in the second damping assembly 800 and the second drive unit 108 are not elaborated upon. It is understood that, except for separate descriptions and conflicting situations, the relevant content regarding the first damping assembly 700 in the embodiments shown in Figures 3 to 14 and the relevant content regarding the first drive unit 106 in Figures 16 to 19 can also be applied to the second damping assembly 800 and the second drive unit 108, respectively.

[0375] It is understood that the folding hinge 023 shown in Figure 25 has two pairs of driving parts, namely a pair of driving parts formed by two first driving parts 106 and a pair of driving parts formed by two second driving parts 108. In some other embodiments, the folding hinge 023 shown in Figure 25 may also have only one pair of driving parts, and this application embodiment does not limit this.

[0376] To improve the stability of the folding hinge 023, in some embodiments of this application, please refer to Figure 26, which is a simplified schematic diagram of another folding hinge provided in an embodiment of this application.

[0377] Unlike Figure 25, the folding hinge 023 shown in Figure 26 uses the first left damping swing arm 500A1 and the second left damping swing arm 500A2 as examples to illustrate their cooperation relationship. The cooperation relationship between the first right damping swing arm 500B1 and the second right damping swing arm 500B2 can be implemented with reference to this.

[0378] The first left damping swing arm 500A1 has a pin 501 extending along the Y-axis at one end facing the second left damping swing arm 500A2, and the second left damping swing arm 500A2 has a pin hole 502 extending along the Y-axis at one end facing the first left damping swing arm 500A1. The pin 501 is inserted into the pin hole 502, and the pin 501 and the pin hole 502 are circumferentially clearance fitted.

[0379] The so-called circumferential clearance fit refers to the surface clearance fit between the pin 501 and the pin hole 502 in the circumferential direction. It can be understood that when the pin 501 is inserted into the pin hole 502 with a circumferential clearance fit, the first damping swing arm 500A1 and the second left damping swing arm 500A2 can move relative to each other in the Y-axis direction. Furthermore, the insertion of the pin 501 into the pin hole 502 also allows the first left damping swing arm 500A1 and the second left damping swing arm 500A2 to rotate synchronously, thereby reducing the risk of deformation in the first housing 021 and the second housing 022 in Figures 1 and 2 caused by the different rotation angles of the first left damping swing arm 500A1 and the second left damping swing arm 500A2.

[0380] Of course, in some other embodiments, the positions of the pin 501 and the pin hole 502 can also be interchanged, which will not be described in this application embodiment.

[0381] Furthermore, this application embodiment also provides a folding hinge 023 with two damping components as shown in FIG27, based on FIG22.

[0382] For example, please refer to Figure 27, which is a simplified schematic diagram of another folding hinge structure provided in an embodiment of this application.

[0383] The folding hinge 023 shown in Figure 27 also includes two damping components: a first damping component 700 and a second damping component 800. The first damping component 700 and the second damping component 800 are axially symmetrical about the straight line O5 along the X-axis.

[0384] Except for cases where there are separate explanations or contradictions, the relevant details of the first damping assembly 700 can be found in the description in Figure 22. It should be noted that, compared to Figure 22, the cooperation relationship between the first moving frame 710 and the left rotating part 520A and the right rotating part 520B in the first damping assembly 700 has changed, which will be described in detail later.

[0385] Except for cases where there are separate explanations or contradictions, the relevant details of the second damping assembly 800 can be adapted to refer to the relevant descriptions in Figure 23. It should be noted that, compared to Figure 24, the cooperation relationship between the second moving frame 810 and the left rotating part 520A and the right rotating part 520B in the second damping assembly 800 has changed, which will be described in detail later.

[0386] To improve the damping effect, based on the same inventive concept as Figure 22, the base 100 in Figure 27 also includes a second left drive unit 108A and a second right drive unit 108B. The functions of the second left drive unit 108A and the second right drive unit 108B are similar to those of the first left drive unit 106A and the first right drive unit 106B in Figure 17, used to drive the rotating part 520 to move the damping swing arm 500 along with the second moving frame 810. The technical effects of adding the second left drive unit 108A and the second right drive unit 108B can be seen in the description of the technical effects of adding the first left drive unit 106A and the first right drive unit 106B in Figure 17, and will not be repeated here.

[0387] It should be noted that the moving direction of the second moving frame 810 in Figure 27 is opposite to that of the first moving frame 710. In order to support the rotating part 520 and the damping swing arm 500 to move in opposite directions with the second moving frame 810 and the first moving frame 710, the damping swing arm 500 and the rotating part 520 in Figure 27 are also separated.

[0388] Specifically, the left damping swing arm 500A includes a first left damping swing arm 500A1 (i.e., the first damping swing arm) and a second left damping swing arm 500A2 (i.e., the second damping swing arm) that are spaced apart in the Y-axis direction; the right damping swing arm 500B includes a first right damping swing arm 500B1 (i.e., the first damping swing arm) and a second right damping swing arm 500B2 (i.e., the second damping swing arm) that are spaced apart in the Y-axis direction.

[0389] The left rotating part 520A includes a first left rotating part 520A1 (i.e., the first rotating part) and a second left rotating part 520A2 (i.e., the second rotating part) spaced apart in the Y-axis direction; the right rotating part 520B includes a first right rotating part 520B1 (i.e., the first rotating part) and a second right rotating part 520B2 (i.e., the second rotating part) spaced apart in the Y-axis direction. The first left damping swing arm 500A1 is rotatably connected to the base 100 via the first left rotating part 520A1; the second left damping swing arm 500A2 is rotatably connected to the base 100 via the second left rotating part 520A2; the first right damping swing arm 500B1 is rotatably connected to the base 100 via the first right rotating part 520B1; and the second right damping swing arm 500B2 is rotatably connected to the base 100 via the second right rotating part 520B2.

[0390] The first left rotating part 520A1 and the second left rotating part 520A2 each have a first end and a second end that are arranged opposite to each other in the Y-axis direction; the first right rotating part 520B1 and the second right rotating part 520B2 each have a first end and a second end that are arranged opposite to each other in the Y-axis direction. Unlike the embodiment shown in Figure 25, in Figure 27, the first and second ends of the first left rotating part 520A1, the second left rotating part 520A2, the first right rotating part 520B1, and the second right rotating part 520B2 are reversed. That is, the second end of the first left rotating part 520A1 faces the first left support arm 400A1, the first end of the first left rotating part 520A1 faces away from the first left support arm 400A1 and towards the first end of the second left rotating part 520A2, and the second end of the second left rotating part 520A2 faces the second left support arm 400A2; the second end of the first right rotating part 520B1 faces the first right support arm 400B1, the first end of the first right rotating part 520B1 faces away from the first right support arm 400B1 and towards the first end of the second right rotating part 520B2, and the second end of the second right rotating part 520B2 faces the second right support arm 400B2.

[0391] First, the first damping component 700 and the two first drive units 106 will be described.

[0392] The second end of the first movable frame 710 extends between the first left rotating part 520A1 and the second left rotating part 520A2, and engages with the first end of the first left rotating part 520A1, thereby achieving engagement with the left rotating part 520A; the second end of the first movable frame 710 also extends between the first right rotating part 520B1 and the second right rotating part 520B2, and engages with the first end of the first right rotating part 520B1, thereby achieving engagement with the right rotating part 520B.

[0393] The first left drive unit 106A is located on the side of the first left rotating unit 520A1 facing the first left support arm 400A1, that is, on the side facing the second end of the first left rotating unit 520A1. The first end of the first left drive unit 106A cooperates with the second end of the first left rotating unit 520A1, and the second end of the first left drive unit 106A extends away from the first left rotating unit 520A1. The first right drive unit 106B is located on the side of the first right rotating unit 520B1 facing the first right support arm 400B1, that is, on the side facing the second end of the first right rotating unit 520B1. The first end of the first right drive unit 106B cooperates with the second end of the first right rotating unit 520B1, and the second end of the first right drive unit 106B extends away from the first right rotating unit 520B1.

[0394] Next, the second damping component 800 and the two second drive units 108 will be described.

[0395] The second end of the second movable frame 810 extends between the first left rotating part 520A1 and the second left rotating part 520A2, and engages with the first end of the second left rotating part 520A2, thereby achieving engagement with the left rotating part 520A; the second end of the second movable frame 810 also extends between the first right rotating part 520B1 and the second right rotating part 520B2, and engages with the first end of the second right rotating part 520B2, thereby achieving engagement with the right rotating part 520B. It should be noted that the definition of engagement and specific implementation here can be adapted to the relevant descriptions of the engagement between the second end of the first movable frame 710 and the second ends of the left rotating part 520A and the right rotating part 520B in Figures 9 to 14.

[0396] The second left drive unit 108A is located on the side of the second left rotating unit 520A2 facing the first left support arm 400A1, that is, on the side facing the second end of the second left rotating unit 520A2. The first end of the second left drive unit 108A engages with the second end of the second left rotating unit 520A2, and the second end of the second left drive unit 108A extends away from the second left rotating unit 520A2. The second right drive unit 108B is located on the side of the second right rotating unit 520B2 facing the second right support arm 400B2, that is, on the side facing the second end of the second left rotating unit 520A2. The first end of the second right drive unit 108B engages with the second end of the second right rotating unit 520B2, and the second end of the second right drive unit 108B extends away from the second right rotating unit 520B2. It should be noted that the definition of the engagement and the specific implementation here can be referred to the relevant description of the engagement between the second end of the first left drive unit 106A and the left rotating unit 520A in Figures 16 to 19.

[0397] The embodiment shown in Figure 27 provides a second layout scheme for the second movable frame 810 and the second elastic element 820 in the folding hinge 023. The technical effects of this second layout scheme can be referred to the relevant description of the second layout scheme of the second movable frame 810 and the second elastic element 820 in the folding hinge 023 in Figure 24 above, and will not be repeated here.

[0398] Furthermore, it is understood that the principle by which the second damping component 800 provides damping force in Figure 27 is similar to that of the first damping component 700, but the moving direction of the second moving frame 810 is opposite to that of the first moving frame 710, resulting in opposite directions of the provided damping force. The principle by which the first moving frame 710 provides damping force can be referred to the relevant description in Figure 22, and the principle by which the second damping component 800 provides damping force can be understood by adaptation. It is also understood that the folding hinge 023 in Figure 27 is provided with two damping components, the first damping component 700 and the second damping component 800, and the first elastic element 720 of the first damping component 700 and the second elastic element 820 of the second damping component 800 are both located in areas outside the first and second support swing arms, which can reduce the distance between the first and second support swing arms, thereby improving the impact reliability of the folding hinge 023.

[0399] It should be noted that the technical solution in Figure 26 can also be implemented based on Figure 27, and can be adapted for understanding; therefore, it will not be repeated here. Furthermore, the above content focuses on describing the positional distribution of the components of the newly added second damping assembly 800 and the second drive unit 108 in the folding hinge 023 shown in Figure 27. Specific implementation methods regarding the structure and mating relationships of the components in the second damping assembly 800 and the second drive unit 108 are not detailed here. It is understood that, except for separate descriptions and conflicting situations, the relevant content regarding the first damping assembly 700 in the embodiments shown in Figures 3 to 14 and the relevant content regarding the first drive unit 106 in Figures 16 to 19 can also be applied to the second damping assembly 800 and the second drive unit 108, respectively.

[0400] It should be noted that the first damping component 700 and the second damping component 800 in Figures 25 and 27 are axially symmetrical about the straight line O5 along the X-axis. In some other embodiments, the first damping component 700 and the second damping component 800 in Figures 25 and 27 may also be arranged in an alternating manner. Specifically, the first damping component 700 in Figure 25 can be replaced with the first damping component 700 in Figure 27, and correspondingly, the first drive unit 106 is also replaced; or, the second damping component 800 in Figure 25 can be replaced with the second damping component 800 in Figure 27, and correspondingly, the second drive unit 108 is also replaced; or, the first damping component 700 in Figure 27 can be replaced with the first damping component 700 in Figure 25, and correspondingly, the first drive unit 106 is also replaced; or, the second damping component 800 in Figure 27 can be replaced with the second damping component 800 in Figure 25, and correspondingly, the second drive unit 108 is also replaced.

[0401] It should be noted that the base 100 is illustrated in Figures 21 to 27 using a filled pattern. To clearly illustrate each structure, the base 100 in the figures is divided into multiple separate structures. In practical implementation, the specific structure of the base 100 and its mating relationships with other structures can be seen in the illustrations in Figures 3 to 14.

[0402] In Figures 24 to 27, the first left-hand rotating part 520A1 and the second left-hand rotating part 520A2 share a second left-hand rotating shaft. In specific implementation, the second left-hand rotating shaft can also be split into two separate segments along the straight line O5, which pass through the first left-hand rotating part 520A1 and the second left-hand rotating part 520A2 respectively. Similarly, the second right-hand rotating shaft shared by the first right-hand rotating part 520B1 and the second right-hand rotating part 520B2 can also be split into two separate segments along the straight line O5.

[0403] The folding hinge 023 shown in Figures 3 to 27 only illustrates two pairs of adjacent support arms 400 in the Y-axis direction and a pair of damping arms 500 located between the two pairs of adjacent support arms 400, and uses this as a basis to introduce improvements to the damping assembly. It is understood that in specific implementations, the folding hinge 023 may include multiple pairs of support arms 400 arranged sequentially at intervals in the Y-axis direction. A pair of damping arms 500 may be provided between all or part of two adjacent pairs of support arms 400 in the Y-axis direction. The improvements to the damping assembly shown in Figures 3 to 27 can be implemented in similar structures in other locations.

[0404] Furthermore, in the folding hinge 023 shown in Figures 3 to 27, the first damping component 700, comprising a first movable frame 710 and a first elastic element 720, is used as an example for illustration. In some other embodiments, the first damping component 700 may include more or fewer components. For example, the first damping component 700 may not include the first movable frame 710, but only the first elastic element 720. In this case, the second end of the first elastic element 720 forms the first end of the first damping component 700, cooperating with the rotating part 520. It can be understood that since the first end of the first elastic element 720 extends to the second side of the first support arm, it still has the spacing benefit between the two pairs of support arms 400. Similarly, the second damping component 800 in the folding hinge 023 shown in the aforementioned embodiments can also be implemented accordingly.

[0405] Furthermore, in the specific implementation, the folding hinge 023 may include a pair of support arms 400 (i.e., two first support arms), and a pair of damping arms 500 are disposed on one side of the pair of support arms 400. The improvement of the damping component shown in Figures 3 to 27 is implemented in this structure, which can reduce the distance between the damping arms 500 and the support arms 400, thereby making the support arms 400 provide better support to the base 100 at the position of the damping arms 500. During a drop, the intrusion of external impact to the position of the damping arms 500 is smaller, making it less likely for the base 100 to crush the foldable display screen 01 it carries at this position, thereby improving the impact reliability of the folding hinge 023.

[0406] In the above embodiments, the descriptions of each embodiment have different focuses. Parts not described in detail or in a particular embodiment can be referred to in the relevant descriptions of other embodiments. Furthermore, the above content is merely a specific implementation of this application, but the protection scope of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the protection scope of this application.

Claims

1. A folding hinge, characterized in that, include: Base; First support arm; The first support arm is rotatably connected to the base; Damped swing arm; The damping swing arm includes a rotating part, and the damping swing arm is rotatably connected to the base about a rotation axis through the rotating part; the side where the rotating part is located is the first side of the first support swing arm in the axial direction of the rotation axis; the side of the first support swing arm facing away from the rotating part is the second side of the first support swing arm. A first damping component; a first end of the first damping component engages with the rotating part; a second end of the first damping component is located on the second side of the first support swing arm and engages with the base for limiting. When the rotating part rotates with the damping swing arm, the first end of the first damping assembly moves relative to the second end of the first damping assembly along the axial direction.

2. The folding hinge according to claim 1, characterized in that, The first damping assembly includes a first movable frame and a first elastic element; Wherein, the first elastic element is located on the second side of the first support swing arm; the first end of the first elastic element forms the second end of the first damping assembly, the second end of the first elastic element cooperates with the first end of the first movable frame, the second end of the first movable frame forms the first end of the first damping assembly, and the first end and the second end of the first elastic element are arranged opposite to each other in the axial direction. When the rotating part rotates with the damping swing arm, the first moving frame moves relative to the base along the axial direction, thereby causing the second end of the first elastic member to move relative to the first end of the first elastic member along the moving direction of the first moving frame.

3. The folding hinge according to claim 2, characterized in that, The folding hinge further includes a second support arm that is spaced apart from the first support arm along the axial direction; the second support arm is rotatably connected to the base. The rotating part is located between the first support arm and the second support arm.

4. The folding hinge according to claim 2 or 3, characterized in that, The rotating part has a first end and a second end that are disposed opposite to each other in the axial direction, with the first end of the rotating part facing the first support arm. The second end of the first movable frame extends between the rotating part and the first support swing arm, and cooperates with the first end of the rotating part.

5. The folding hinge according to claim 4, characterized in that, The base includes a first limiting part, which is spaced apart on the second side of the first supporting swing arm; The first elastic element is located between the first support arm and the first limiting part, and the first end of the first elastic element abuts against the first limiting part; The first end of the first movable frame extends between the first elastic member and the first support swing arm, and abuts against the second end of the first elastic member.

6. The folding hinge according to claim 2 or 3, characterized in that, The rotating part has a first end and a second end that are disposed opposite to each other in the axial direction, and the first end of the rotating part is opposite to the first support arm. The second end of the first movable frame extends to the side of the rotating part opposite to the first supporting swing arm and engages with the first end of the rotating part.

7. The folding hinge according to claim 6, characterized in that, The base includes a first limiting part, which is disposed on the second side of the first support swing arm; The first end of the first elastic member abuts against the first limiting portion, and the second end of the first elastic member faces away from the first limiting portion. The first end of the first movable frame extends to the side of the first elastic member opposite to the first limiting portion and abuts against the second end of the first elastic member.

8. The folding hinge according to any one of claims 4 to 7, characterized in that, The base includes a first driving part; a first end of the first driving part cooperates with a second end of the rotating part, and the second end of the first driving part extends away from the rotating part. When the rotating part rotates with the damping swing arm, the rotating part moves relative to the base along the axial direction with the first moving frame, so as to drive the second end of the first elastic member to move relative to the first end of the first elastic member along the moving direction of the first moving frame.

9. The folding hinge according to claim 3, characterized in that, The side of the second support arm that is away from the first support arm is the second side of the second support arm; The folding hinge further includes a second damping component that is spaced apart from the first damping component along the axial direction; The first end of the second damping component engages with the rotating part; the second end of the second damping component is located on the second side of the second support arm and engages with the base for limiting. When the rotating part rotates with the damping swing arm, the first end of the second damping assembly moves relative to the second end of the second damping assembly along the axial direction; The first end of the second damping component moves in the opposite direction to the first end of the first damping component.

10. The folding hinge according to claim 9, characterized in that, The second damping assembly includes a second movable frame and a second elastic element; The second elastic element is located on the second side of the second support swing arm. The first end of the second elastic element forms the second end of the second damping assembly. The second end of the second elastic element cooperates with the first end of the second movable frame. The second end of the second movable frame forms the first end of the second damping assembly. The first end and the second end of the second elastic element are arranged opposite to each other in the axial direction. When the rotating part rotates with the damping swing arm, the second moving frame moves relative to the base along the axial direction, thereby causing the second end of the second elastic member to move relative to the first end of the second elastic member along the moving direction of the second moving frame.

11. The folding hinge according to claim 10, characterized in that, The first end of the rotating part faces the first supporting swing arm, and the second end of the rotating part faces the second supporting swing arm; The second end of the first movable frame extends between the rotating part and the first support swing arm, and cooperates with the first end of the rotating part; The second end of the second movable frame extends between the rotating part and the second support swing arm, and cooperates with the second end of the rotating part.

12. The folding hinge according to claim 11, characterized in that, The base includes a first limiting part and a second limiting part, the first limiting part being spaced apart on the second side of the first supporting swing arm, and the second limiting part being spaced apart on the second side of the second supporting swing arm. The first elastic element is located between the first limiting part and the first support swing arm. The first end of the first elastic element abuts against the first limiting part, and the second end of the first elastic element faces away from the first limiting part. The first end of the first movable frame extends between the first elastic element and the first support swing arm and abuts against the second end of the first elastic element. The second elastic member is located between the second limiting part and the second support swing arm. The first end of the second elastic member abuts against the second limiting part, and the second end of the second elastic member faces away from the second limiting part. The first end of the second movable frame extends between the second elastic member and the second support swing arm and abuts against the second end of the second elastic member.

13. The folding hinge according to claim 10, characterized in that, The rotating part includes a first rotating part and a second rotating part that are spaced apart along the axial direction; the damping swing arm is rotatably connected to the base through the first rotating part and the second rotating part; the first end of the first rotating part faces the first supporting swing arm, the first end of the second rotating part faces the second supporting swing arm, and the second ends of the first rotating part and the second ends of the second rotating part face each other. The second end of the first movable frame extends between the first rotating part and the second rotating part, and cooperates with the second end of the first rotating part; The second end of the second movable frame extends between the first rotating part and the second rotating part, and cooperates with the second end of the second rotating part.

14. The folding hinge according to claim 13, characterized in that, The base includes a first limiting part and a second limiting part, the first limiting part being disposed on the second side of the first supporting swing arm, and the second limiting part being disposed on the second side of the second supporting swing arm; The first elastic element is located on the side of the first limiting portion opposite to the first supporting swing arm. The first end of the first elastic element abuts against the first limiting portion, and the second end of the first elastic element faces away from the first limiting portion. The first end of the first movable frame extends to the side of the first elastic element opposite to the first limiting portion and abuts against the second end of the first elastic element. The second elastic member is located on the side of the second limiting portion opposite to the second supporting swing arm. The first end of the second elastic member abuts against the second limiting portion, and the second end of the second elastic member faces away from the second limiting portion. The first end of the second movable frame extends to the side of the second elastic member opposite to the second limiting portion and abuts against the second end of the second elastic member.

15. The folding hinge according to claim 10, characterized in that, The damping swing arm includes a first damping swing arm and a second damping swing arm spaced apart in the axial direction; the rotating part includes a first rotating part and a second rotating part spaced apart in the axial direction; the first damping swing arm is rotatably connected to the base through the first rotating part, and the second damping swing arm is rotatably connected to the base through the second rotating part; The first rotating part has a first end and a second end disposed opposite to each other in the axial direction; The second end of the first movable frame engages with the first end of the first rotating part; the base includes a first driving part; the first end of the first driving part engages with the second end of the first rotating part, and the second end of the first driving part extends away from the first rotating part; when the first rotating part rotates with the first damping swing arm, the first rotating part moves with the first movable frame along the axial direction relative to the base, so as to drive the second end of the first elastic member to move relative to the first end of the first elastic member along the moving direction of the first movable frame. The second end of the second movable frame engages with the second rotating part.

16. The folding hinge according to claim 15, characterized in that, The first end of the first rotating part faces the first supporting swing arm; the base includes a first limiting part, which is spaced apart on the second side of the first supporting swing arm; The second end of the first movable frame extends between the first rotating part and the first supporting swing arm, and cooperates with the first end of the first rotating part; the first elastic member is located between the first supporting swing arm and the first limiting part, the first end of the first elastic member abuts against the first limiting part, and the second end of the first elastic member faces the first supporting swing arm; the first end of the first movable frame extends between the first elastic member and the first supporting swing arm, and abuts against the second end of the first elastic member.

17. The folding hinge according to claim 15, characterized in that, The first end of the first rotating part faces away from the first supporting swing arm; the base includes a first limiting part, which is spaced apart on the second side of the first supporting swing arm; The second end of the first movable frame extends between the first rotating part and the second rotating part, and cooperates with the first end of the first rotating part; the first elastic member is located on the side of the first limiting part away from the first supporting swing arm, the first end of the first elastic member abuts against the first limiting part, and the second end of the first elastic member faces away from the first limiting part; the first end of the first movable frame extends to the side of the first elastic member away from the first limiting part, and abuts against the second end of the first elastic member.

18. The folding hinge according to any one of claims 15 to 17, characterized in that, The second rotating part has a first end and a second end that are disposed opposite to each other in the axial direction; The second end of the second movable frame engages with the first end of the second rotating part; the base further includes a second driving part; the first end of the second driving part engages with the second end of the second rotating part, and the second end of the second driving part extends away from the second rotating part and fixes the base; when the second rotating part rotates with the second damping swing arm, the second rotating part moves with the second movable frame along the axial direction relative to the base, so as to drive the second end of the second elastic member to move relative to the first end of the second elastic member along the moving direction of the second movable frame.

19. The folding hinge according to claim 18, characterized in that, The first end of the second rotating part faces the second supporting swing arm; the base includes a second limiting part, which is spaced apart on the second side of the second supporting swing arm; The second end of the second movable frame extends between the second rotating part and the second supporting swing arm, and cooperates with the first end of the second rotating part; the second elastic member is located between the second supporting swing arm and the second limiting part, the first end of the second elastic member abuts against the second limiting part, and the second end of the second elastic member faces the second supporting swing arm; the first end of the second movable frame extends between the second elastic member and the second supporting swing arm, and abuts against the second end of the second elastic member.

20. The folding hinge according to claim 18, characterized in that, The first end of the second rotating part faces away from the second supporting swing arm; the base includes a second limiting part, which is spaced apart on the second side of the second supporting swing arm; The second end of the second movable frame extends between the first rotating part and the second rotating part, and cooperates with the first end of the second rotating part; the second elastic member is located on the side of the second limiting part away from the second supporting swing arm, the first end of the second elastic member abuts against the second limiting part, and the second end of the second elastic member faces away from the second limiting part; the first end of the second movable frame extends to the side of the second elastic member away from the second limiting part, and abuts against the second end of the second elastic member.

21. The folding hinge according to any one of claims 15 to 20, characterized in that, One of the first damping swing arm and the second damping swing arm is provided with a pin extending along the axial direction, and the other of the first damping swing arm and the second damping swing arm is provided with a pin hole extending along the axial direction. The pin is inserted into the pin hole, and the pin and the pin hole are circumferentially fitted.

22. The folding hinge according to any one of claims 2 to 21, characterized in that, The rotation axis is not on the same straight line as the center line of the first elastic element extending along the axial direction.

23. The folding hinge according to any one of claims 2 to 22, characterized in that, The first movable frame includes a drive engagement part, an extension part, and an elastic element drive part; The second drive unit forms the second end of the first movable frame; the first elastic member forms the first end of the first movable frame; The extension has a first end and a second end disposed opposite to each other in the axial direction. The first end of the extension is fixed to the drive engagement part, and the second end of the extension is fixed to the elastic member drive part.

24. The folding hinge according to any one of claims 2 to 23, characterized in that, The base has a tunnel extending in the axial direction; the tunnel is through which the first movable frame passes; the surface of the tunnel is provided with a smooth coating.

25. A foldable electronic device, characterized in that, include: The folding hinge as described in any one of claims 1 to 24; A foldable display screen; the foldable display screen is disposed on one side of the folding hinge and is folded or unfolded based on the folding hinge.

26. The foldable electronic device according to claim 25, characterized in that, The foldable display screen includes a first display area, a second display area, and a third display area; the third display area is connected between the first display area and the second display area. The foldable electronic device further includes a first housing and a second housing; the first housing carries the first display area, the second housing carries the second display area, and the folding hinge connects the first housing and the second housing to carry the third display area.

27. The foldable electronic device according to claim 26, characterized in that, The folding hinge includes two first support arms and two damping arms; in the flattened state of the folding hinge, the two first support arms are each located on opposite sides of the width direction of the base of the folding hinge, and the two damping arms are each located on opposite sides of the width direction, which is perpendicular to the axial direction. One of the first support swing arms has its end facing away from the base fixedly or rotatably connected to the first housing, and the other of the first support swing arms has its end facing away from the base fixedly or rotatably connected to the second housing; one of the damping swing arms has its end facing away from the base linearly slidably connected to the first housing, and the other of the damping swing arms has its end facing away from the base linearly slidably connected to the second housing.

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